This thread has been going on for awhile now, and many thanks goes out to those who took the time to respond.
I'd like to address a couple of things. First off, this wasn't an issue with the drivers for either the monitor or the video card. The monitor drivers worked fine from the get go, and I tried a vast array of drivers with the video card ranging from the Catalyst drivers to the hacked Omega drivers. Same results each time.
Second, the x1900xtx is not too "old" to play games like Crysis, a game that was designed to run on systems as much as three years old. I had also installed the game on a computer running an X1300 256MB card and a single-core proccessor, and while certainly choppy, the game did in fact run. If an X1300 256MB card can run Crysis, then certainly an X1900XTX 512MB card paired with an Athlon X2 can at least load the game.
The issue was actually hardware related. The 1900 has 2 LEDs on the card; one for power and one for fault. One or both light up when their assigned issues are raised. In this case, it was the fault LED. So, I gritted my teeth and shelled out the money for a GeForce 8800GTX 768MB card. Both the card and the PSU are made by BFG. I loaded up the game, and sure enough, everything ran just fine. Newegg allowed me to RMA the old card, and now Crysis looks beautiful.
On a side note, I'd like to add that Patriot is absolutely right. The game is a total performance hog. According to several articles I ran across, a system running three 8800 Ultras in a triple SLI configuration still couldn't max out the game on the max resolution. I have a feeling Crysis was designed to be the pioneer for next-gen gaming.
Link to Article: Crysis running at 35fps on three graphic cards