Hi,
Welcome to the Windows7 Forums
You can't restire it without using the original program that was used to make the backup. If you used XP backup, that doesn't exist in Windows 7. You should have simply copied your important documents, music, videos, pictures, etc to an external drive.
All 3rd party apps need to be re-installed.
Look for a directory named c:\windows.old and go through the contents looking for anything you might want to save.
Not sure if it will be there, as I've always do a "clean" install.