Since I don't have any GF5200 of GF3 (lowest spec'ed hardware around is a GF6100), I have a little question about what they actually support with the latest drivers...
Do you know if they support GLSL f.i.? at least vertex programs with CPU emulation may be supported I would guess, but what about fragment shaders? Is there minimal support for the GF3 or none at all?

For instance, could you try running the simple GLSL demo at
http://www.delphi3d.net/forums/viewtopic.php?t=314
and let us know if it works and what kind of framerate you're seeing? Thanks