[coolsilver]

Android is based off linux. I would figure however the imgfs is mounted it is some subset that is eventually merged into the full disk structure on boot.

I'd say you could setup the system and rootfs in the same partition and some how mount the rest as part of it.

More or less how /data could be on a separate partition but otherwise doesn't matter once it is mounted.

Not all sure how it all fits together but has to be a logical fit.