The onboard graphics chip in the Nforce2 IGP southbridge is a Geforce4 MX, AFAIK identical to the GPU you would get on a sperate G4MX but it shares your system memory through the AGP bus instead of having its own dedicated memory. (I assume your Nforce2 has onboard graphics, if you do have a seperate card post it)
Now, this is a bad thing because its not DirectX9 compatable. Its missing most of the advanced shaders you find on the real Geforce cards like the Ti series. MX has always been mostly for office applications and other non-demanding tasks, although it is a capable enough polygon shifter that it is usable enough for gaming.
I would think it will run though, shaders are supposed to supplement a graphics engine, and every engine Ive seen that uses them can run without them. You lose the fancy effects of course, but it should work.
And if it dosent a DX9 compatable card should be available at a pseudo-reasonable price by next year. The original GeforceFX cards are not worth touching (The place for heat pipes and >40Db fan assemblies is in an *overclocked* rig, not stock hardware) but the ATI radeon cards are worth a look. I'm not as familiar with that line though, but I think the 9600 Pro would do the trick. The newer varieties of GFX look better as well.
www.tomshardware.com is worth a look, their benchmarks are done in depth and the review should mention DX9 compatability and everything else you need to know.