@agyar: Okay, that one should *definitely*, be supported.
Can you PM me the MRPI log (it's in extensions/MRInstaller/log/mrinstaller.log)?
Alternatively, it's plaintext, and what's logged should hopefully be clear enough to figure out for yourself

.
(Again, if you weren't already, try to get me a log generated with the current MRPI snapshot, I added some more logging at one point and can't remember if that made it in the last release).
EDIT: For posterity's sake, @agyar resolved his issue (PEBCAK during the original extraction of MRPI

).