Ok lets try to figure this out,
1 - Go to your computer "Control Panel"
2 - Double Click "System"
3 - Then Select Tab "Computer Name"
4 - Then click on the button that is on the right of the sentence "To change the name of this computer...", the button caption is "Change..."
5 - Change the computer name to your first name for example, and on the frame "Member of", select option WorkGroup and then give it a name (ex: " HOUSE")
6 - Then OK
7 - Ok again
Wait until the computer makes the changes and the system window disapear.
1 - Now on the "Control panel", click "Network Connections"
2 - Right click on "Local Area Network" and choose "Properties"
3 - Now on the list names "This connection uses....", select if not selected:
- "Microsoft network client"
- "Share files and printes on microsoft networks"
4 - Click OK
Wait until every thing is done again.
Now go to your dads computers and do the same, just change the compuer name to a different one, but do not change the workgroup that must be the same. In some cases you must reboot the computer, do it.
Besides the fact that are different OS, in fact the XP is an improvement "or not in my opinion" of the W2k, but the management menu's are the same.
I hope i have helped in some way, any question just ask.
Regards
Nuno