My video card has software problems?

I have a geforce2 mx400 i formatted my hard drive and installed vista ultimate and now i can't find any driver downloads for geforce2 mx400 the downloads are only for below Xp64-bit and i can't use direct3d, 3dmark and those other things. I can only use opengl which sucks because it lagging when i full screen (I'm not used to windowed games). I also been thinking of buying a new video card in the Philippines because i live in the Philippines, Pampanga, Angeles city if you know any place that sells video cards in angeles tell and it's supposed to be agp slot you know the slot for geforce2 mx400. That would really help. TY.