The Knoppix LiveCD provides a cloop format for its compression of the program material.

In addition, a second compression format ...cramfs... can be utilized if Klik is introduced after install of the LiveCD.

Perhaps a third compression could also be applied after boot-up...for what purpose I have no idea....just thought it might be interesting to think about.

Perhaps 3D encoded on two compression formats.

Maybe ...cramfs0...cramfs1...cramfs(x).

Edit: Actually, cloop, cramfs and zisofs provide three compression LiveCD (or desktop, too)