I was just about giving an update in another message (will send it right after this).
I focused on `grub-installer` the last hours and haven't yet tried to build and install
a modified udeb. I'd like to try that first before rebuilding, because if manage to get
a modified udeb installed with anna, it would be a useful functionality for later development.
On the other hand, that change shouldn't affect any other subarches than "newworld_powermac",
so why not create a new image. But wait for my next message, because there could be more changes
to incorporate. :-)