America´s Army/XP crash

I need some Major Geek help (not sure if this thread belongs here or somewhere else so please bear with me)....

The Problem:
I have been happily playing AA for a couple of months on my relatively new PC (3 months old) which I believe is up to spec:

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System Information
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Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_gdr.061219-0316)
System Model: MS-7187
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: Intel(R) Pentium(R) D CPU 3.00GHz (2 CPUs)
Memory: 2046MB RAM
Page File: 534MB used, 3404MB available
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DxDiag Version: 5.03.2600.2180 32bit Unicode
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Display Devices
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Card name: NVIDIA GeForce 7300 LE
Manufacturer: NVIDIA
Chip type: GeForce 7300 LE
DAC type: Integrated RAMDAC
Display Memory: 512.0 MB
Current Mode: 1280 x 1024 (32 bit) (70Hz)
Monitor: Plug and Play Monitor (Samsung Syncmaster 901n) 19" flat panel
Monitor Max Res: 1600,1200
Driver Name: nv4_disp.dll
Driver Version: 6.14.0010.8426 (English) (Have tried latest Versions 93.71 forceware and it made no difference so I rolled right back)

anyway one day I was playing AA (16/03/2007) and windows restarted I have auto restart switched on so I´m taking this info from the minidump file which was created since then I can only play AA for very limited periods of time no matter what graphics settings i choose (in game and out game) I´ve tried uninstalling clearing and re-installing all drivers, re-installing AA and various other support forums (people keep telling me it´s a temperature issue (which it isn´t or a power supply issue which it isn´t becasue I´ve monitored these and the problem only occurs with AA no other games)

I´ve installed the XP debug tools and checked out the windows minidumps and I have checked out the AA minidump but they are all really vague, although the reported probable casues and process names are: (in no particular order)
cause_________________process
ntkrpamp.exe___________MsMpEng.exe
Kmixer.sys_____________ArmyOps.exe
memory_corruption______ArmyOps.exe and System
ks.sys_________________ArmyOps.exe
cmudax.sys____________ArmyOps.exe
win32k.sys_____________Realmon.exe

I gues I´m really most interested in the ArmyOps ones, but I don´t know, of course all the logs mention bad memory address references etc, I would be most grateful for any assistance that anyone can offer, I´ve tried or I think I´ve tried all the basic solutions and now it´s time for some hardcore help, I´m no guru but I know my way around my PC, this is driving me insane. if need be I can post the full minidump logs in text format.

 

Hmm...well just to be sure, run Memtest to rule out a memory problem. Report any errors.

 

OK I ran 4 simaltaneous instances of Memtest for 8 hours Each covering 500MB 500Mb 500Mb and 300MB all sesions got up to abot 3000% complete and none of them reported any errors.

 

I had a really good read on this, very detail, and very useful information.
Thanks.