Thanks to you both for the confirmation about using the Windows files, it will make things a lot simpler.
Given the situation I imagine there are a number of ex Dolphin users floating about here - Hi All. I noticed the, sadly, late Bill Schwab posted here sometimes, and he was once as much a committed a Dolphin user as I was. I shall continue using Dolphin though, the ability to create Windows executables is too useful to give up. My only problem now is that as I ported my app from Dolphin to Pharo I made some significant changes - so now I've got to port it back the other way!