Ah ok, I figured that might be the case about the .exe.. Anyway, thanks Tradewind, all sorted now!
I had another question - Someone mentioned there are big raster based pilot charts of the South Atlantic from NOAA, or NGA, which you could actually download and get printed for navigation. I have no idea if this is true, or what the implications are, but that's one I've been told. Can any Americans enlighten me on the subject?