Actually, I couldn't get it to work on a PB170. Procedure was:

d/l in OSX.4 -> .dsk file not recognized, and gave up.

d/l in OS9, forced file recognition in Stuffit Expander -> disk image, from which I made floppy via DiskCopy. All seemed well.

However, the PB170 will not boot from the floppy. Have I missed something?