Graphics card: 64 MB GeForce2 MX 400 w/TV Out (official nForce Beta Driver installed)
i have this same card, RF runs fine on DirectX, i would tend to shy away from the openGL driver as it's not finished it lacks some of the features that the directX one has...
try downloading new drivers from nvidia's website this might fix the problem..
if that doesn't work try this
lower the resolution in the realityfactory.ini(er i think it's this ini haven't touched RF for a bit) this may help as well, this video card gave me a few headaches for a bit as well, you just need to tinker around with the display settting till it works, a pain i know, seems related with a lower end vid cards, cos i chuck RF on my mates comp and it works straight up first time.