Frau Kaleun, CapZap, thanks for the pointers. I've located the files you each mentioned so I'll give them a prod and a poke and let you know how I get on.
Also CapZap....Conus' mod I found here....
http://www.subsim.com/radioroom/showthread.php?t=170191
And the RUb-1.45 mod; I've had it for years so I've uploaded it here....
http://www.mediafire.com/download.php?75cvz6jgnc1cj44
I hope the developers don't mind me hosting it....I don't think it's easy to find these days as it's long been superseded by the NYGM Tonnage War series. I like it because it's not too heavy on my weedy laptop.