OK, I've MRoogled my heart out and each "solution" is left open ended (gee thanks) so I want to ask for help in my specific case. I have 3 computers on my network, a MacBook, a MacBook Pro and my Power Mac G4. When I connect to either the Power Mac G4 or MacBook it auto-connects as a guest with limited access. However I CANNOT connect to the MacBook Pro as a guest no matter what I do. I have to be a Registered User to access ANY files on my MacBook Pro. The MacBook and MacBook Pro both run 10.6 and the Power Mac is running 10.4. Thanks.