LiveKernelEvent in Vista 64 Ultimate SP1

Hello all, I'm having an issue with games locking up and crashing due to a driver error called LiveKernelEvent. This issue started about a month ago when I decided to return to CoX and check out issue 14. Within 10-15 mintues of game play CoX would crash to desktop without any warning displaying a "Driver has stop working, but has recovered message at the bottom of screen. Was running drivers 182.02 at the time and then upgraded to 182.50 and still nothing changed. Finally Nvidia released the new 185.85 drivers and CoX ran a lot smoother for a while and then crashe again. I was blamming CoX at the time because every new issue had its share of BUGS, but I went back to Fallout 3 and downloaded the new Broken Steel expansion pack and it still crashed to desktop. Three months ago, I had no issues running games and have no clue of what has changed in my system since returning to CoX on April 10th. After coming back to CoX, my game running experience has been a nightmare, so far the only game that does not act up is Sins of Solar Empire Enrichment and that gets boring after 1hr of gameplay, LOL.
I did some research on this LiveKernelEvent and seen the usual reinstall vista, reinstall or reload video drivers that is of no help to most people, but my main concern is my RAM. Two of my sticks are 1Gigs Cas 4 RAMs which I bought back in 2007 and my two new 2Gigs RAM are Cas 5 and only 2 months old. Maybe the Cas 4 are too fast for the Cas 5 and could be causing the issue with the crash, but it only occurs when running games. In Vista itself, all my applications are running at 100% but system does tend to lag when watching Blue Ray Movies, but that could be a codec issue.

I am trying to resolve this issue before all the new games are released in June so if anyone has delt with this issue before please help.

My system is as follows:

AMD Athlon X2 64 6400+ 3.2GHz Dual Core 1024x2 FBS
ASUS M2N SLI Deluxe AM2 NVIDIA nForce 570 64Bit upgraded.

Corsairs XMS2 DDR2 800MHz 6GB RAM clocked @ 4-4-4-12 (Two are 1GBs) = 2Gigs RAM
Corsairs XMS2 DDR2 800MHz 6GB RAM clocked @ 5-5-5-12 (Two are 2GBs) = 4Gigs RAM

320GB Maxtor 7200 RPM 8-16 Cache SATA 3.0 Gb/s (empty drive that use to have XP on it and can not re-format because it thinks XP is still on it)
640GB Seagate 7200 RPM 32MB Cache SATA 3.0 Gb/s (part Vista 64 Ultimate, part Data drive)

Two EVGA Nvidia Geforce 9600GT 512MB 256Bit in SLI (both installed with (185.88 Nvidia Drivers)

Two LITE-ON Sata Drives 20X DVD±R DVD Burner with LightScribe

SLI Thermaltake toughpower 750W PS

NZXT Zero Black/Silver Aluminum ATX with 9 120mm fans and 2 80mm fans

Vista 64 Ultimate with SP1

Description of Error

A problem with your video hardware caused Windows to stop working correctly.

Problem signature
Problem Event Name: LiveKernelEvent
OS Version: 6.0.6001.2.1.0.256.1
Locale ID: 1033

Files that help describe the problem
WD-20090512-1921.dmp
sysdata.xml
Version.txt

View a temporary copy of these files
Warning: If a virus or other security threat caused the problem, opening a copy of the files could harm your computer.

Extra information about the problem
BCCode: 117
BCP1: FFFFFA8007339010
BCP2: FFFFFA600361DB10
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_0_6001
Service Pack: 1_0
Product: 256_1