thecakeisafake said:
Exactly. Got it all working now, including Homegroups, so if I share folder "Mum" with "HomeGroup" and folder "Bro" with "Everyone", "Bro" is visible on the XP based PC, and "Mum" is visible on my mums PC.

The lock thing, appears that if I add "Everyone" via the simple sharing menu the lock disappears.
If I then remove "Everyone"'s permissions via the Advanced Sharing menu, and stop sharing it there, the lock doesn't appear. pff.

Thanks for all the help everyone :)
You are most welcome. Anytime.

Robert