One the helpful advice of someone who has purchased "Ghost City Raiders", I've spent a great deal of time today trying to develop a zip bundle containing the starting elements for the game (ie. the core rules, 10 characters and 10 scenarios).
This has been a bit of a nightmare, but hopefully it's been resolved.
I've also tried to make sure that the game is publicised in as many places as possible, including an entry over on Wargames Vault (the sister site to RPGNow and DrivethruRPG).
I've actually been selling a few units of the full game. So the hard work seems to have been paying off.