Yes, it is pretty much that simple. There are some caveats, though. If you create a different UserID in Windows and then try to restore, the files will go to an alternate location of your choosing during the restore and won't go to the proper places in the User folders. If you already have a file by the same name in the destination location, the restore will not overwrite it, but will place it elsewhere. For example, if you are using Outlook for email and after the system is reinstalled, you reinstall and configure Outlook, a new .pst file will be created. Restore will not overwrite this new .pst file and you will need to import the data from the restored file.
-steve