@motorollin
Sure, but ......
The OF will just load boot.img (I think it was MOS1.0 or maybe 1.1) from the normal MOS-HD.
That will get the ABox going, which then searches for bootable FFS or SFS formated drives, and boot the one with the highest pri.
In my case that was the DH0: partition on the A4000-HD.
The only think that suprised me that it survided "setpatch", but that did probraly check the version and thought "wtf v50 ?? I'm only v45.xxx .... someone is doing a prank on me !! I'm on strike !!!!"