Native Resolution - Far Cry 2, Crysis Warhead

[Netaku]

http://www.techsupportforum.com/gami...s-warhead.html

I am having the same problem as Rolovel above.
Trying to run Far Cry 2. When i first installed the game, (as distributed through Steam) i just set everything on ultra high and loaded a new game. Well, i got about 1 FPS, So i turned everything to "high" (which was the lowest option) and tried running it again.
Immediately, i got the "running in a window" error as described above. Even when i let the game load in the window, it just freezes the whole computer.

Running same monitor as above, Asus 22". running on Intel e8400 core2 3.0 Ghz OC to 3.8. 2 GB DDR2 800mhz, ATI Radeon HD 4850 x2. Vista 64bit Sp1.

Trying to run at 1680 x 1050. All drivers up to date. Monitor and game refresh both rate set to 60. Have already uninstalled and reinstalled game, and double checked drivers.

I really want the game to work and i am very tech savvy (built this computer myself) , so any help would be appreciated.