Hehe, 20 years after buying the original game and I'm slowly getting there with cracking and filing this game.  Knocked out the protection checks and have written a file loader.  It may even work on  half meg if I can find a little code cave to stick my routine in to make it work in 512k.  :)   Still trying to do a trainer for it but can't spend much time on it atm.
Watch this space.  ;)