A few things to possibly consider...
1) As I related in [link|http://z.iwethey.org/forums/render/content/show?contentid=99562|#99562], some motherboards have timing issues with PCI boards. You might try a different slot for your SCSI card. Oh, you've already done that. :-/
2) Memory timing can give similar problems. Can you slow the system down and/or try different RAM?
3) I recently got a copy of [link|http://xenia.sote.hu/~kadzsol/rexx/sajat/updcd.htm|updCD]. I haven't tried it yet though. Perhaps there are some later kernels, fixes, etc. on it that will help you through the install.
4) If you do IRC, you might want to try for pointers with people at [link|http://www.scoug.com/help/livehelp.html|SCOUG and VOICE].
Nothing much shows up on google: USB problems sharing IRQs with sound cards and LAN cards; unable to recognize new HDs; etc. I didn't find anyone running Warp on this board.
If XP runs OK on it, and you like the board and system otherwise, you may have simply found one that Warp etc. doesn't like. My guess is there's something about the board that Warp doesn't like (e.g. BIOS, RAM) and that you'd have better luck with a different board. Or you may simply have a bad motherboard.
I hope you get it figured out. Please report back either way.
Cheers,
Scott.
