Hey Hood, thanks for the suggestion, I had considered the possibility, but I simply didn't have room for another computer.
I did fix the problem however!!!
Turns out I needed to use the BETA Windows XP GeForce driver version 177.79 that can be found at the following site:
http://www.nvidia.com/object/winxp_177.79_beta.html
Anyone having problems with this sim and using similar hardware to mine may want to try it out.