I'm glad I am not the only one still messing up his xbox 1.
After a long time and perhaps the wrong places to search, I finally came across with the slayer 2.7 autoinstaller.
I tried to install XBMC as main dashboard (retail hdd) and it wouldn't start. I managed to boot from the slayer DVD and managed to install Avalaunch, which worked ok.
Then I gave it another try installing XBMC and now I'm stuck. The dashboard wont start, neither any disc, copy, slayer or original games.
How do I get around this? Help please?!??