[Arnie]

If it's a dos disk with a startup-sequence then you can use isomount and assign commands to boot it.

You will need to alter your SS to check for adf booting then execute it before WB starts. Bear in mind that it will be slower from HD and would take a fair bit of memory to load into Ram:.

A Gotek is the cheapest and by far the easier alternative.

I've put a bootable adf in the zone to give you an idea of what's required.