Well, I can say the AGP is a pretty old format and I wouldnt no it can cut it for the newer games you've just listed.
You can give the Radeon HD 3850 a try: http://www.newegg.com/Product/Product.aspx?Item=N82E16814102730
This is probably the best AGP card available for $100 but It doesnt have a good chance in playing the latest pc games, pci express x16 is the way to go. I would consider that getting a legitamate upgrade wont do the trick. My best advice is the card can probably play those games on the lowest settings possible.
Above I'm a proud Gran Turismo fan, not a Sony fanboy, and now a proud 360 owner, but sharing xbox live accts ATM
End of 2009 Predictions (made Jan 1, 2009): My predictions were pretty accurate, the 360 was over and the Wii was just under.
Wii: 65 mil (yea I'm crazy) 360: 35 mil (its getting there) PS3: 30 mil (the slim better do well)
End of 2010 Predictions (made Jan 7, 2010):
Wii: 81 mil 360: 47 mil PS3: 45 mil
