Solved
- Reason for the box to hang with the USB-drives connected, was because they were not Ext4. Pity, but understandable for a Linux box
With the multiboot, I now tried ATV and BH and have deleted them again from the slots.
I did set them up, with the tuners and channels, but seeing some things so different, I then decided to not put more effort in them to try and get used to them.
After 12 years using VIX, I'm too used to it probably, and for me it is the more logical one.
Please be aware this is my personal opinion, and in no way indicative of the possibilities the other 2 images most probably DO have, but I was just too lazy.
Thanks for the help on both issues.
Hans