Thanks to the 38 people who saw this thread.. I solved my problems..
1. Can i move the DriveKey-chip to another Wii (that works) and change the autoboot setting, and then move it BACK to the bricked Wii, and use it to autoboot.
2. 2. Is it correct that the DriveKey-chip is able to boot discs signed using the trucha-bug, even though the Wii itself would usually NOT allow it (as in my case)
Thread can be locked..