How to delete a Backup from a backup set in SQL Server 2008 R2 The title pretty much sums it up. We are running out of space on our backup disks, and need to remove old backups out of the set. I can't seem to find any information on this.
I would change your backup strategy to write to individual files for each database backup.  You could then have a maintenance plan step that examines your backup location and removes *.bak files older the X days.