We had to do an upgrade for a customer this week. He was running Win2K on a P3 450 with an Asus P3B-F. He wanted to go P3 1Gig on an Asus CUSL-2 C. Win2K came up with inaccesible boot device on boot up. Could not install driver for ATA100 controller. To get around it we installed a Promise Ultra33 card we had laying around. Rebooted. Shut down and put new board in with Promise card on it and Hard drive and CDROM installed on the Promise. After a successful boot, we installed the Intel chipset software. Rebooted, and installed everythin on the Mobo. Worked great. Saved a reformat, and the procedure listed on the Knowledge base was ridiculously long. We would have reformatted instead.
That Promise card is now a part of our arsenal.
Hope it helps
Jim