Hello roseysdaddy Welcome to the Seven Forums!
You may have to try this again backing up files for your dad but by using a different option. Back Up Data without Booting to Vista - Vista Forums
That requires a Vista dvd where you boot live from that to go into the Repair tools and open the command prompt option for the copy and paste method to flash drive or external hard drive. If Vista was running using the built-in option for saving files and settings would be the preferred method where you would be able to restore them on the fresh 7 installation. Backup Files - Vista Forums
The two guides are from SF's sister forum over at VistaForums. The lengthy file number names appear to have been renamed by the data recovery method you used on the drive once removed from the Vista machine itself. Did you use a 3rd party tool like DrRecovery or some other program like that?
Saw that happen when retrieving everything from an old XP machine resulting in 1,000+ folders with all kinds of number folders to sift through when recovering files from a corrupt partition. The manual copy and paste method seen in the first guide at least preserves the original folder names as well as individual folders.
If you had elected to perform a clean install of 7 over the old Vista installation all user files would have been preserved in the Windows.old folder by default when not seeing the drive reformatted. The original folder structure is retained as well. If the drive was reused you may lost the option for the first method however.