Called 3Ware support, who gave me an idea on how to get the RAID card working in the 1.4GHz box.
No worries, though...I got a 2GHz board/processor and half a gig of RAM, and now my server's humming right along.
Put a new power supply into Laurie's machine, but Win2K doesn't seem to want to boot from the old 6GB drive in there...guess I'll put the 15GB drive that originally came in my TiVo into her machine, copy everything over, and try again.
Oy.