Sharing an XP computer on a samba network?

I have a server (suse / samba) with workstations (windows XP) logging onto a
domain. Each workstation can share the server HD.

If I add a new windows PC can I set it up to allow the workstations (logged
onto the server domain) to share the hard drive of this new PC without the
new PC being logged onot the domain itself?

Ultimatly, I wish to VPN into the network, and share the drive of this new
XP computer, without sharing/joining the domain server/linux box?

I.e local computer, join domain and can share server AND new PC
VPN computers can share new PC only?