Multiple clones on same partition?

[ninobravo]

Hmmm... sort of.
So if I want the clones to be bootable, then they should live on their own partition?
Ideally, I do want each of the clones to be bootable, so that I can always revert to them in case of a system failure. Same for my girlfriend's system, and of course, the clean "rescue" system install. But you're right, I don't want to waste drive space by partitioning too much.
These sparse images sound like data backups, but not bootable backups. I guess as long as the "rescue" system is bootable, and can repair any potential issues that may arise, I guess all I'd need is to backup my data in order to be able to restore it after repairing.