Vista - How to delete the list of backup dates from Vista Ultimate

I've re-organised my files and folders so I deleted the last full system backup and 3 incremental backups of files and folders in preparation prior to running a new system backup. I've used the tutorials on Vista Forums to edit the registry so that now when I go to Backup and Restore Centre the two entries for last time I backed up files and folders and the entry for the last system backup have gone. However if I select Restore Files or Advanced Restore and tick select files from an older backup, the 3 dates for the backups I made are still listed I have turned off System Restore and used the disk clean up utility to remove restore points and shadow copies from all the hard disks but the list is still showing those 3 dates. If I try to select any of the dates and go through the process of finding a file to restore I can see the folder with the date showing when it was backed up then the file but when I select a file and click next I get the error code 0x8100001A. I expected this as the backup set is gone but how do I get rid of the information that says the file is backed up?

"BigCat" <guest@xxxxxx-email.com> wrote in message
news:db5e68587d094fae1e116a2a3b9656c8@xxxxxx-gateway.com...You should never delete your previous backup prior to creating a new,
current backup. You are left with no backup when starting a long process
that may or may not complete successfully, and may even be the cause of the
crash that requires you to use a backup to recover. If you need more room,
try moving the prior backups, or restarting the cycle sooner so that you
have less space used. Until you are certain the new backup actually works,
it is a good idea to keep at least one prior backup at all times. I have
more than once, had to step back a cycle to get a good backup. It doesn't
much matter what software is used. It only takes one corrupt file or sector
to kill the whole backup.

Good luck.