I hope you don't consider this response to be a troll reply, but...
Texstar's KDE 3.1 packages worked just fine for me, and most others as far as I know. I have the main distribution, contrib, plf, and Texstar added to my urpmi sources, so I didn't really notices what dependency issues there might be. The 9.0 packages aren't on his mirrors anymore, but someone here may still have them. I realize you just went through a compilation...
I'm currently using an ATI AIW Rage 128 Pro on Mandrake 9.1. I didn't do anything special to get it working. There are some minor quirks with the TV tuner, but that's related XF86 4.3. I experienced the same quirks with XF86 4.3 under Mandrake 9.0, and eventually went back to XF86 4.2.1. When Mandrake 9.1 was released, I managed to find some work-arounds for the TV-tuner issues. The only thing that I couldn't get working (and I didn't really try) is DRI. I could never get DRI working under Mandrake 8.x or 9.0 with the AIW R128 Pro. Since I have seen other Rage 128 cards work with DRI out of the box, I assume the problem is with my motherboard/chipset.