I have MOS and Mac OS X on 1 drive how do i set mos as the default boot.
that drive is something like this:-
128mb,60mb(dh0),128mb,50gb(dh1),128mb, 100gb(mac)
this is on a 160gb hard drive?

i can boot via the alt key but would just like to switch on for MOS and alt for mac

http://dreamolers.binaryriot.org/dualboot.pdf (right at the end of that PDF).

...or direct link to the chapter:

http://library.morph.zone/Dual-boot_MorphOS_and_MacOS_X_on_a_Mac_Mini_G4#Trying_it_out.2C_changing_the_default_system

that's just what I was looking for thanks