I have used Isomount a couple of times (
http://aminet.net/package/util/rexx/isomount124).
It's for CLI only but it works.
You can also use winuae to do the installation and then transfer the installation folder to your real Amiga.
Maybe some assigns won't be transfered this way but it's something that you can easily fix most of the times.
Have you considered of buying a HxC or a Gotek floppy emulator?
These are life savers!
