I think there are no problems to port the installer to MacOSX, but I
don't have a Mac to test it, I only have PearPC (installed, but no
much work on it).
If somebody helps me to test it, I could add that platform.
I can definetly help testing, as I have a Mac :)
I'm not sure about FLTK on OSX though. Using X11 would be a
sub-optimal solution for an installer. If FLTK ccan run natively under
Aqua that would be extremly cool :)
Generally I would also suggest a seperation of installer/GUI to enable
even broader use.
-Martin