STL,
What exactly is the problem? Where are you getting stuck?
The XP utility is actually a cut-down of Seagate Backup Exec (this goes back to the days of NT4), which got bought by Veritas, who in turn got bought by Symantec. But I digress.
Despite its age, it is still quite usable, and you can certainly specify USB attached external disks as the backup location.
SD