IIRC, what i've seen is that the beige G3 will not boot OSX from the slave at all. Even with rev2 or 3 roms.

LEM concurs: http://lowendmac.com/ppc/beige-power-mac-g3-1997.html

xpostfacto might get around this but I think you have to setup the master as the helper disk. If you haven't got it figured out before this weekend. I can try to do some disk swaping to do some testing.