These instructions will set up printer sharing
between a Windows 7 and Windows XP machine. BOTH machines must be on
the same network for the printer to be shared.
On the Windows 7 machine
Verify the settings under Advanced Sharing Settings.
Confirm that password protection is turned off in Advance Sharing Settings.
Go to Network in Windows 7 and you should see your XP machine and the Windows 7.
To share the printer on the Windows 7 machine

In the Properties screen click the Sharing Tab and check the box to share the printer and type in its share name.
If your XP machine is an x86 OS you can install Additional Drivers before setting up the XP machine.
Go to Network->Windows 7 machine to see the Users folders and devices (you should also see the printer)
On the XP machine Go to My Network Places and find the Windows 7 shared Users folder
- Double-click
on the shared folder to see a list of folders in the public folder on
Windows 7 (you should see XP Printer folder).
To set up the shared printer on the XP machine