I guess you mean building new debian base with chroot?
I've never tried loading on the fly. I'm 100% positive it is possible because I know JBV is working on this option for FoxyRoxyLinux and he has a solution.
Live-snapshot - I guess you mean something like:
Code: Select all
mksquashfs /live/cow /live/image/live/shapshot.squashfs
Anyway there is a way to remaster wheezy with shapshot from save file or partition called persistence with persistence.conf file inside. This configuration file gives options to save all changes or even changes in only one or few folders (which is good). I think it will be easy to automate snapshot process for both wheezy and squeeze.
I've never build debian with chroot like you so I don't think I can give advice how to fix things there. If I missunderstand something from your post, please, clarify it again.
Cheers, Toni