By XP Boot Disk I assume you mean the boot floppy diskette that WinRescue XP makes. Most new PCs do not have floppy diskette drives, so it would not work on it but if the PC has a floppy diskette drive then, it will work on it.
The Restore Wizard has a screen that says, "Which of Backup to Restore". If you select WinRescue, it will go to your Config files. If you select Windows, it will go to the WinXP Restore Points.