I can see plenty of results for installing MorphOS FROM a USB stick but is it possible to install MorphOS ONTO a usb stick / drive on a PowerPC Mac and boot from that? I have run the installer from the CD and have used the automatic partition setup and installed MorphOS onto an 8GB USB stick but can't seem to boot it using open firmware.

It may be because I'm not savvy with how this is done but have tried:

boot usb1:2,\\bootinfo.txt for example after checking using disk utility with OSX what the partition number the boot partition is on the USB stick AND which is the correct usb alias for the port the stick is plugged into and I'm getting no boot with the error "LOAD-SIZE is too small!"

When the USB stick is plugged into the Mac when OSX is loaded I can see the "boot" partition and it contains:
boot.img
bootinfo.txt