I'm with Salu on this.
Wot you probably need is some means of adding them as 'hot-swap' drives. XP will understand about USB and Firewire drives and, I think, even supports hot-swap on SATA.
Another USB2 to parallel ATA adaptor:
http://cpc.farnell.com/jsp/endecaSea...=CS10025&N=411
SATA to ATA adaptor:
http://cpc.farnell.com/jsp/endecaSea...=CS09891&N=411
The more I learn about XP the more I hate it!