Building Win standalones on a Mac

[Richmond]

I have tried building Windows standalones using 4.5 (which, until I make 
some money out of the thing is as far as
I can go) on Mac, Linux and Win with no joy.

I have no problem with 4.0; except that it mucks around with PNG images 
that have transparent areas.

So . . .

Does anybody have any advice about building standalones using Metacard 
with the 4.5 engines for different platforms
than that on which Metacard is running at that moment?