wish for multiple parallel backups

Binary package hint: sbackup

I wish that you could define multiple backups in sbackup, each with its own rules as how many backups to store, when to create the backups, etc.
The reasoning behind this is that I have a huge music collection, and an equally huge pictures directory. I want to backup both the music and the pictures, but if I tell sbackup to do it together with the system-files backup, my backup hd would be full in a few days.
So it would be ideal if I could have one backup rule for the system files (backup often, save lots of backups), and one for the music and images (backup once per day, but stay incremental for a long time and never have more than 1 full backups on hand at a time) - that would be great!

Also as a side-wish, since music and images are already in compressed formats (usually) it would be very useful to be able to tell sbackup _not_ to gzip backups, just to tar them.