[U-Boot] Create a Bootable DAS U-Boot pen drive

[muffie at lavabit.com]

Hello all,

    I'm wondering if in theory it's possible to create a bootable
pen-drive with U-Boot on it to allow the following:

   1st) Take a PPC Mac Mini for instance that runs OpenFirmware.
   2nd) Boot it from the USB Pen-drive
   3rd) U-Boot will be loaded
   4th) U-Boot would offer the possibility to boot directly from a OS that
it's expecting U-Boot as native boot device, like: Amiga OS 4 on
Sam440p
   5th) Boot occurs normally as it should be if Mac was equipped with U-Boot.

   That would be somehow similar with Efi-X that allows installation of OS
X directly on regular pc's, right?

   Is that possible?

Att,