hello,
I did what you're trying to do a few times before. I got my hd from a1200 (which is a 2.5 drive with 5 partitions), connected it to a pci IDE expansion card on my pc, and the winUAE could see it and boot it perfectly. I'm also on winxp sp2. I never selected uae.scsi device or something ? (maybe win uae did it automatically ?) what I could advice you is to try once as your amiga hd master drive in the secondary IDE channel (same jumper as on your amiga).I know it doesn't sound very logical but I think it's worth trying.
