Dang it! I was just at borders. lol Thanks, I'll have to give that a glance.
I re-config'd the RAM, and so far everything is much faster and very stable. Crysis Warhead's optimal settings now are at "Gamer" settings, and I put it on 8X AA and everything runs smooth as silk. Still not sure if I have everything set up right, but I think I'm making progress.
OCZ 4gigs DDR3 1600
SAPPHIRE Radeon HD 4890
Corsair 650w PSU
Windows 7 RC1