Thank you for your support Bacchus, it really is greatly appreciated.
I've been having a think about your request.
It seems to me that things like PRG load addresses are very project specific and so would really demand to be saved IN the project file as opposed to as some general CharPad settings.
I'm not sure I would want to expose all users to this sort of programming detail or even make them think about it, this is a graphics application after all.
CharPad already supports export to (raw) binary files (obviously), a whole export section is devoted to it and I wouldn't really want to basically duplicate this section just for PRG export .
So, on balance I would have to conclude that a better solution would be to handle conversion from BIN to PRG with a simple command-line tool.
A batch script could be tailored to perform the conversions very conveniently for any set of exported binaries and would allow very easy/quick modifications to be made (ie. in NotePad).
I would be surprised if such a tool doesn't already exist but if not then I can make one.
This may not be the reply you were hoping for but I genuinely do think this is would be a better way.
Cheers mate.