The m4p image does have all passwords disabled, but it does not auto-boot on model 4. I'd love to use this image m4p on my model 4 instead of the `lsdos` one, but I have no idea how to modify it to auto-boot. I just started new thread with this question.From my notes
Rec 02&h Byte 50&h
Change 28&h to 18h
I think I did this when I created the self booting 4P image on Ian's site so that image should have all p/words disabled.