diff --git a/src/BulletCollision/BroadphaseCollision/btBroadphaseProxy.h b/src/BulletCollision/BroadphaseCollision/btBroadphaseProxy.h
index 8b7a59a22..db98e28fa 100644
--- a/src/BulletCollision/BroadphaseCollision/btBroadphaseProxy.h
+++ b/src/BulletCollision/BroadphaseCollision/btBroadphaseProxy.h
@@ -170,7 +170,7 @@ ATTRIBUTE_ALIGNED16(struct) btBroadphasePair
 	m_pProxy0(0),
 		m_pProxy1(0),
 		m_algorithm(0),
-		m_userInfo(0)
+		m_internalInfo1(0)
 	{
 	}
 
@@ -180,7 +180,7 @@ BT_DECLARE_ALIGNED_ALLOCATOR();
 		:		m_pProxy0(other.m_pProxy0),
 				m_pProxy1(other.m_pProxy1),
 				m_algorithm(other.m_algorithm),
-				m_userInfo(other.m_userInfo)
+				m_internalInfo1(other.m_internalInfo1)
 	{
 	}
 	btBroadphasePair(btBroadphaseProxy& proxy0,btBroadphaseProxy& proxy1)
@@ -199,7 +199,7 @@ BT_DECLARE_ALIGNED_ALLOCATOR();
         }
 
 		m_algorithm = 0;
-		m_userInfo = 0;
+		m_internalInfo1 = 0;
 
 	}
 	
@@ -207,7 +207,7 @@ BT_DECLARE_ALIGNED_ALLOCATOR();
 	btBroadphaseProxy* m_pProxy1;
 	
 	mutable btCollisionAlgorithm* m_algorithm;
-	mutable void* m_userInfo;
+	mutable union { void* m_internalInfo1; int m_internalTmpValue;};//don't use this data, it will be removed in future version.
 
 };
 
diff --git a/src/BulletCollision/BroadphaseCollision/btOverlappingPairCache.cpp b/src/BulletCollision/BroadphaseCollision/btOverlappingPairCache.cpp
index db25ef2af..b3416f630 100644
--- a/src/BulletCollision/BroadphaseCollision/btOverlappingPairCache.cpp
+++ b/src/BulletCollision/BroadphaseCollision/btOverlappingPairCache.cpp
@@ -256,7 +256,7 @@ btBroadphasePair* btHashedOverlappingPairCache::internalAddPair(btBroadphaseProx
 //	pair->m_pProxy0 = proxy0;
 //	pair->m_pProxy1 = proxy1;
 	pair->m_algorithm = 0;
-	pair->m_userInfo = 0;
+	pair->m_internalTmpValue = 0;
 	
 
 	m_next[count] = m_hashTable[hash];
@@ -287,7 +287,7 @@ void* btHashedOverlappingPairCache::removeOverlappingPair(btBroadphaseProxy* pro
 
 	cleanOverlappingPair(*pair,dispatcher);
 
-	void* userData = pair->m_userInfo;
+	void* userData = pair->m_internalInfo1;
 
 	btAssert(pair->m_pProxy0->getUid() == proxyId1);
 	btAssert(pair->m_pProxy1->getUid() == proxyId2);
@@ -405,7 +405,7 @@ void*	btSortedOverlappingPairCache::removeOverlappingPair(btBroadphaseProxy* pro
 		{
 			gOverlappingPairs--;
 			btBroadphasePair& pair = m_overlappingPairArray[findIndex];
-			void* userData = pair.m_userInfo;
+			void* userData = pair.m_internalInfo1;
 			cleanOverlappingPair(pair,dispatcher);
 			if (m_ghostPairCallback)
 				m_ghostPairCallback->removeOverlappingPair(proxy0, proxy1,dispatcher);
diff --git a/src/BulletMultiThreaded/PosixThreadSupport.cpp b/src/BulletMultiThreaded/PosixThreadSupport.cpp
index ffde13d89..ff45ab7e9 100644
--- a/src/BulletMultiThreaded/PosixThreadSupport.cpp
+++ b/src/BulletMultiThreaded/PosixThreadSupport.cpp
@@ -120,7 +120,7 @@ static void *threadFunction(void *argument)
 }
 
 ///send messages to SPUs
-void PosixThreadSupport::sendRequest(uint32_t uiCommand, uint32_t uiArgument0, uint32_t taskId)
+void PosixThreadSupport::sendRequest(uint32_t uiCommand, ppu_address_t uiArgument0, uint32_t taskId)
 {
 	///	gMidphaseSPU.sendRequest(CMD_GATHER_AND_PROCESS_PAIRLIST, (uint32_t) &taskDesc);
 	
diff --git a/src/BulletMultiThreaded/PosixThreadSupport.h b/src/BulletMultiThreaded/PosixThreadSupport.h
index 329eca059..c7349baa9 100644
--- a/src/BulletMultiThreaded/PosixThreadSupport.h
+++ b/src/BulletMultiThreaded/PosixThreadSupport.h
@@ -100,7 +100,7 @@ public:
 
 
 ///send messages to SPUs
-	virtual	void sendRequest(uint32_t uiCommand, uint32_t uiArgument0, uint32_t uiArgument1);
+	virtual	void sendRequest(uint32_t uiCommand, ppu_address_t uiArgument0, uint32_t uiArgument1);
 
 ///check for messages from SPUs
 	virtual	void waitForResponse(unsigned int *puiArgument0, unsigned int *puiArgument1);
diff --git a/src/BulletMultiThreaded/SequentialThreadSupport.cpp b/src/BulletMultiThreaded/SequentialThreadSupport.cpp
index 986a75101..a1a473aeb 100644
--- a/src/BulletMultiThreaded/SequentialThreadSupport.cpp
+++ b/src/BulletMultiThreaded/SequentialThreadSupport.cpp
@@ -33,7 +33,7 @@ SequentialThreadSupport::~SequentialThreadSupport()
 #include <stdio.h>
 
 ///send messages to SPUs
-void SequentialThreadSupport::sendRequest(uint32_t uiCommand, uint32_t uiArgument0, uint32_t taskId)
+void SequentialThreadSupport::sendRequest(uint32_t uiCommand, ppu_address_t uiArgument0, uint32_t taskId)
 {
 	switch (uiCommand)
 	{
diff --git a/src/BulletMultiThreaded/SequentialThreadSupport.h b/src/BulletMultiThreaded/SequentialThreadSupport.h
index 8930cfe01..67f7f2e6b 100644
--- a/src/BulletMultiThreaded/SequentialThreadSupport.h
+++ b/src/BulletMultiThreaded/SequentialThreadSupport.h
@@ -71,7 +71,7 @@ public:
 	virtual	~SequentialThreadSupport();
 	void	startThreads(SequentialThreadConstructionInfo&	threadInfo);
 ///send messages to SPUs
-	virtual	void sendRequest(uint32_t uiCommand, uint32_t uiArgument0, uint32_t uiArgument1);
+	virtual	void sendRequest(uint32_t uiCommand, ppu_address_t uiArgument0, uint32_t uiArgument1);
 ///check for messages from SPUs
 	virtual	void waitForResponse(unsigned int *puiArgument0, unsigned int *puiArgument1);
 ///start the spus (can be called at the beginning of each frame, to make sure that the right SPU program is loaded)
diff --git a/src/BulletMultiThreaded/SpuCollisionTaskProcess.cpp b/src/BulletMultiThreaded/SpuCollisionTaskProcess.cpp
index 867964857..a43b97a67 100644
--- a/src/BulletMultiThreaded/SpuCollisionTaskProcess.cpp
+++ b/src/BulletMultiThreaded/SpuCollisionTaskProcess.cpp
@@ -128,7 +128,7 @@ void SpuCollisionTaskProcess::issueTask2()
 
 
 
-	m_threadInterface->sendRequest(CMD_GATHER_AND_PROCESS_PAIRLIST, (uint32_t) &taskDesc,m_currentTask);
+	m_threadInterface->sendRequest(CMD_GATHER_AND_PROCESS_PAIRLIST, (ppu_address_t) &taskDesc,m_currentTask);
 
 	// if all tasks busy, wait for spu event to clear the task.
 	
diff --git a/src/BulletMultiThreaded/SpuGatheringCollisionDispatcher.cpp b/src/BulletMultiThreaded/SpuGatheringCollisionDispatcher.cpp
index 3c5c5e76c..9d9186e28 100644
--- a/src/BulletMultiThreaded/SpuGatheringCollisionDispatcher.cpp
+++ b/src/BulletMultiThreaded/SpuGatheringCollisionDispatcher.cpp
@@ -106,9 +106,9 @@ public:
 		//by default, Bullet will use this near callback
 		{
 			///userInfo is used to determine if the SPU has to handle this case or not (skip PPU tasks)
-			if (!collisionPair.m_userInfo)
+			if (!collisionPair.m_internalTmpValue)
 			{
-				collisionPair.m_userInfo = (void*) 1;
+				collisionPair.m_internalTmpValue = 1;
 			}
 			if (!collisionPair.m_algorithm)
 			{
@@ -132,11 +132,11 @@ public:
 						void* mem = m_dispatcher->allocateCollisionAlgorithm(so);
 #endif
 						collisionPair.m_algorithm = new(mem) SpuContactManifoldCollisionAlgorithm(ci,colObj0,colObj1);
-						collisionPair.m_userInfo = (void*) 2;
+						collisionPair.m_internalTmpValue =  2;
 					} else
 					{
 						collisionPair.m_algorithm = m_dispatcher->findAlgorithm(colObj0,colObj1);
-						collisionPair.m_userInfo = (void*)3;
+						collisionPair.m_internalTmpValue = 3;
 					}
 				} 
 			}
@@ -179,7 +179,7 @@ void	SpuGatheringCollisionDispatcher::dispatchAllCollisionPairs(btOverlappingPai
 		for (i=0;i<numTotalPairs;i++)
 		{
 			btBroadphasePair& collisionPair = pairPtr[i];
-			if (collisionPair.m_userInfo == (void*)3)
+			if (collisionPair.m_internalTmpValue == 3)
 			{
 				if (collisionPair.m_algorithm)
 				{
diff --git a/src/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuContactResult.cpp b/src/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuContactResult.cpp
index 24e4e5ed9..05fc22ec0 100644
--- a/src/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuContactResult.cpp
+++ b/src/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuContactResult.cpp
@@ -164,7 +164,7 @@ void SpuContactResult::writeDoubleBufferedManifold(btPersistentManifold* lsManif
     memcpy(g_manifoldDmaExport.getFront(),lsManifold,sizeof(btPersistentManifold));
 
     g_manifoldDmaExport.swapBuffers();
-    uint64_t mmAddr = (uint32_t)mmManifold;
+    ppu_address_t mmAddr = (ppu_address_t)mmManifold;
     g_manifoldDmaExport.backBufferDmaPut(mmAddr, sizeof(btPersistentManifold), DMA_TAG(9));
 	// Should there be any kind of wait here?  What if somebody tries to use this tag again?  What if we call this function again really soon?
 	//no, the swapBuffers does the wait
diff --git a/src/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuGatheringCollisionTask.cpp b/src/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuGatheringCollisionTask.cpp
index b2b85dbcd..e4f5f5cbf 100644
--- a/src/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuGatheringCollisionTask.cpp
+++ b/src/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuGatheringCollisionTask.cpp
@@ -842,7 +842,6 @@ void	processCollisionTask(void* userPtr, void* lsMemPtr)
 	register ppu_address_t	dmaPpuAddress;
 	register ppu_address_t	dmaPpuAddress2;
 
-	int userInfo;
 	int numPairs;
 	register int p;
 	SpuCollisionPairInput collisionPairInput;
@@ -902,9 +901,7 @@ void	processCollisionTask(void* userPtr, void* lsMemPtr)
 					spu_printf("pair->m_pProxy1 = %d\n",pair.m_pProxy1);
 #endif //DEBUG_SPU_COLLISION_DETECTION
 
-					userInfo = int(pair.m_userInfo);
-
-					if (userInfo == 2 && pair.m_algorithm && pair.m_pProxy0 && pair.m_pProxy1)
+					if (pair.m_internalTmpValue == 2 && pair.m_algorithm && pair.m_pProxy0 && pair.m_pProxy1)
 					{
 						dmaSize = sizeof(SpuContactManifoldCollisionAlgorithm);
 						dmaPpuAddress2 = (ppu_address_t)pair.m_algorithm;
diff --git a/src/BulletMultiThreaded/SpuParallelSolver.cpp b/src/BulletMultiThreaded/SpuParallelSolver.cpp
index 0e4376558..13a3e92c1 100644
--- a/src/BulletMultiThreaded/SpuParallelSolver.cpp
+++ b/src/BulletMultiThreaded/SpuParallelSolver.cpp
@@ -578,7 +578,7 @@ void SolverTaskScheduler::issueTask()
 
 	SpuSolverTaskDesc& desc = m_taskDescriptors[m_currentTask];
 	
-	m_threadInterface->sendRequest(1, (uint32_t)&desc, m_currentTask);
+	m_threadInterface->sendRequest(1, (ppu_address_t)&desc, m_currentTask);
 }
 
 void SolverTaskScheduler::flushTasks()
diff --git a/src/BulletMultiThreaded/SpuRaycastTaskProcess.cpp b/src/BulletMultiThreaded/SpuRaycastTaskProcess.cpp
index 579e7ce18..50dd88d0b 100644
--- a/src/BulletMultiThreaded/SpuRaycastTaskProcess.cpp
+++ b/src/BulletMultiThreaded/SpuRaycastTaskProcess.cpp
@@ -79,7 +79,7 @@ void SpuRaycastTaskProcess::issueTask2()
 	SpuRaycastTaskDesc& taskDesc = m_spuRaycastTaskDesc[m_currentTask];
 
 	taskDesc.taskId = m_currentTask;
-	m_threadInterface->sendRequest(1, (uint32_t) &taskDesc,m_currentTask);
+	m_threadInterface->sendRequest(1, (ppu_address_t) &taskDesc,m_currentTask);
 	//printf("send thread requested for task %d\n", m_currentTask);
 	// if all tasks busy, wait for spu event to clear the task.
 	if (m_numBusyTasks >= m_maxNumOutstandingTasks)
diff --git a/src/BulletMultiThreaded/SpuSampleTaskProcess.cpp b/src/BulletMultiThreaded/SpuSampleTaskProcess.cpp
index 7d8a2ded8..11cb9e7c3 100644
--- a/src/BulletMultiThreaded/SpuSampleTaskProcess.cpp
+++ b/src/BulletMultiThreaded/SpuSampleTaskProcess.cpp
@@ -130,7 +130,7 @@ void SpuSampleTaskProcess::issueTask(void* sampleMainMemPtr,int sampleValue,int
 	}
 
 
-	m_threadInterface->sendRequest(1, (uint32_t) &taskDesc, m_currentTask);
+	m_threadInterface->sendRequest(1, (ppu_address_t) &taskDesc, m_currentTask);
 
 	// if all tasks busy, wait for spu event to clear the task.
 	
diff --git a/src/BulletMultiThreaded/Win32ThreadSupport.cpp b/src/BulletMultiThreaded/Win32ThreadSupport.cpp
index 8ff8a9bcf..8aa4cdce6 100644
--- a/src/BulletMultiThreaded/Win32ThreadSupport.cpp
+++ b/src/BulletMultiThreaded/Win32ThreadSupport.cpp
@@ -81,9 +81,9 @@ DWORD WINAPI Thread_no_1( LPVOID lpParam )
 }
 
 ///send messages to SPUs
-void Win32ThreadSupport::sendRequest(uint32_t uiCommand, uint32_t uiArgument0, uint32_t taskId)
+void Win32ThreadSupport::sendRequest(uint32_t uiCommand, ppu_address_t uiArgument0, uint32_t taskId)
 {
-	///	gMidphaseSPU.sendRequest(CMD_GATHER_AND_PROCESS_PAIRLIST, (uint32_t) &taskDesc);
+	///	gMidphaseSPU.sendRequest(CMD_GATHER_AND_PROCESS_PAIRLIST, (ppu_address_t) &taskDesc);
 	
 	///we should spawn an SPU task here, and in 'waitForResponse' it should wait for response of the (one of) the first tasks that finished
 	
diff --git a/src/BulletMultiThreaded/Win32ThreadSupport.h b/src/BulletMultiThreaded/Win32ThreadSupport.h
index 951c8a2e4..183cd2e3a 100644
--- a/src/BulletMultiThreaded/Win32ThreadSupport.h
+++ b/src/BulletMultiThreaded/Win32ThreadSupport.h
@@ -103,7 +103,7 @@ public:
 
 
 ///send messages to SPUs
-	virtual	void sendRequest(uint32_t uiCommand, uint32_t uiArgument0, uint32_t uiArgument1);
+	virtual	void sendRequest(uint32_t uiCommand, ppu_address_t uiArgument0, uint32_t uiArgument1);
 
 ///check for messages from SPUs
 	virtual	void waitForResponse(unsigned int *puiArgument0, unsigned int *puiArgument1);
diff --git a/src/BulletMultiThreaded/btThreadSupportInterface.h b/src/BulletMultiThreaded/btThreadSupportInterface.h
index 11ed1d8a0..0bb775e0c 100644
--- a/src/BulletMultiThreaded/btThreadSupportInterface.h
+++ b/src/BulletMultiThreaded/btThreadSupportInterface.h
@@ -19,6 +19,7 @@ subject to the following restrictions:
 
 //#include <LinearMath/btScalar.h> //for uint32_t etc.
 #include "PlatformDefinitions.h"
+#include "PpuAddressSpace.h"
 
 class btThreadSupportInterface
 {
@@ -27,7 +28,7 @@ public:
 	virtual ~btThreadSupportInterface();
 
 ///send messages to SPUs
-	virtual void sendRequest(uint32_t uiCommand, uint32_t uiArgument0, uint32_t uiArgument1) =0;
+	virtual void sendRequest(uint32_t uiCommand, ppu_address_t uiArgument0, uint32_t uiArgument1) =0;
 
 ///check for messages from SPUs
 	virtual	void waitForResponse(unsigned int *puiArgument0, unsigned int *puiArgument1) =0;