If you don't find a way to use it directly in the XP-guest, you can mount it in the PCLinuxOS-host, and share it to the XP-guest (it will be seen as a network-drive then....)
Thanks for replying. Could you give a bit more explanation of your suggestion. The external drive is currently auto-mounted on boot as /media/%backups. I access it through Dolphin on the host. How do I share the actual drive with XP? Via fstab for example?
I have tried to share the folders on the drive via the share option in Dolphin (presumably to set up Samba shares?) but it just says "Only folders in your home folder can be shared"
I'm missing something here obviously.....