Dear Qubes Development Team,
I am a complete noob with qubes and I am still learning to use it properly.
Accordingly I have split my machine between qubes and a debian jessie 8.6. I first installed qubes into the top 500GB of the hard disk, then debian into the rest. I got the debian installer to write an MBR onto a memory card.
I then hacked qubes' efi environment so i can boot the debian through debian efistub.
I still use the debian as my "main" working environment, but intend to move gradually over to the qubes side as I learn to use it.
Kind regards and thanks a million for your work!