Hi,
my personal time budget for this project is over and I must push achieving the target on the long bank so to say, which could be a year or so.
These are the threads about the current state of acknowledge about realize such thing.
Here
https://lists.debian.org/debian-boot/2016/04/msg00177.html
and here
https://www.redhat.com/archives/virt-tools-list/2016-April/msg00034.html
and here
http://lists.alioth.debian.org/pipermail/simple-cdd-devel/2016-April/000460.html
For somebody accidentally reaches that aim in the meanwhile (on top of it or no), please let me know.
If so, good luck and have fun.
Regards