Have set-up sharing on my old xp box, (took a while didn't have screen or anything connected
at the moment this now shows in Network and sharing centre (I have the LLP provider running on XP),
and I can link to shares via \\servername\sharename.
at the moment I cannot browse the network for resources but obviously can see the shares.
I can also ping the xp box by either name or IP address
whatasteal, you could try to set-up your printer as local then set up a network port pointing to the \\server\printername
XP can see and browse the network and a vista and Windows 7 box
it may be that something is not working on XP or one of the old protocols not working on Win 7 so will have to check this out and post back