1. Plug in the new disk as master, without the old disk.
2. Install Windows XP.
3. Plug in the old disk as master (C: ) , move the new disk to slave (not C: ).
4. Make a folder on the new disk, say "D:\Transfer" (if D: is the new disk). Make folders for each user under that ("D:\Transfer\User1").
5. Run the Move files and settings wizard and select your users transfer directory as the destination for the data.
6. Repeat 5 for all users.
7. Unplug the old disk and move the new disk to master.
8. Create new users with the same name as the ones on the old disk.
9. Restore all users using the wizard in the respective accounts.
That ought to do it. If you feel that any files are missing just copy them afterwards. All mail, favourites, documents and such should be transfered by the wizard.