Right after searching loads of different forums, I eventually read the "READ ME" that came with the 436 update (Duh) and Open GL works fine now, is a little faster, and looks better, UTX PR3 works too (under 10.2.1) which is nice.
Still getting missing textures/black spaces with Rave and High detiuals textures (it's fine in OpenGL).
Ow and I've got 448MB ram, anyone got any tips for tweaking more performance out of UT, say by changing some .ini settings (the same for Q3A's .cfg would be great).
Cheers.