Remote desktop should work fine on xp.
Just follow these steps.
1.Right click My comp, then properties,remote, check both the boxes there.
2.Create an admin account on the pc u want to connect to
3.Go to remote desktop connection in start menu, accessories, communication.
4.Put in the ip address of the comp u want to connect to
5. Put in the username and pass of the admin account u just created.
Now just use the remote computer like as if u were sitting on it.