It's been a long time since I did this, someone will correct me if I'm wrong, and I probably will be. I installed 7.5.5 on it's own HD under Shapeshifter. I think my first hurdle was getting the archives into the Mac emulation. Shapeshifter provided a utility (forgot the name) to share files between the Amiga and the hardfile. I think that I made a second, larger hardfile and copied everything from the first to it. I also DL'ed a copy of Stuffit and DiskCopy, available from most Mac sites. If I recall, DiskCopy allows the "disk images" of the 18 or so install disks (the DL'ed archives) to be installed on the desk top. When executed, the image of disk 1 runs an install script. Sorry I don't remember this more acurately, but maybe it's still useful.
This ended when I upgraded to an 060 which Shapeshifter didn't seem to like. When I found a source of cheap used Macs, there was no need.
Good Luck
