WetWired, get Fraps, it should work for screenshots and videos.

As for the older GF chipset, my friend installed Oblivion on a computer with a GeForce 4, and most of the graphics are completely white, excluding the menus, some characters and a few objects. He updated his drivers with no success. Speaking of which, a friend of told me this out of the blue, although he has not backed his sources:

zajako: I wanted to play [Oblivion] too :/
zajako: I will never pay for another gforce card again
zajako: it works on all old ATI cards
zajako: but gforce paid them not to support older cards
[...]
zajako: i heard about it from a few other games out that they did it
zajako: like the matrix game
zajako: All grafix are white
zajako: cept for video and menus

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Again, there's no backing to any of the things above, and I find it much likely that the older GF cards just have some incompability with parts of the game. Either way, couldn't there possibly be any rouge drivers to take care of this problem?

"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram