Ok, here's HDConfig on the MorphOS side. I had OSX installed already, so I resized its partition downward with gparted and added MorphOS at the end.
I did things a little differently than the guide. My MorphOS bootimage partition is called Boot: in both device name and volume name (whereas the guide uses device name DH0: and volume name Boot:). My SYS: partition is DH0: and my Work: partition is DH1:. I apparently do not have padding between the partitions, except for 128MB at the start of the drive. I don't remember how things got that way.