I just came to Jesus with my new Radeon 64 last week. I opted for a format and reinstall of everything to keep the Radeon install Koser. Im using the 5.13.1.3116 drivers in win2k without any issues. I have found the ATI 4.1 DVD software very buggy so I just installed windvd 2.3 and tweaked it with DVDgenie and the DVD looks much better than from my Gforce ddr. If you dont want to reinstall everything just make sure you have got rid of all the V3 inf files and the V3 entries in the registry.
Rain