krebizfan - Thanks for info, I've been to WILLUS which seems like it MIGHT be the right place but I don't see anything there re EMPEROR - yes, TRS stuff, games, etc. Any sort of BASIC would be fine, the sort of changes you mention would be no problem at all, I've had to do much much worse with other progs in the past.
The prog draws a (crude) map on the screen of Europe, with data on the map. I assume this uses POINT or PLOT or similar. Quite well done really for 1980.
REgarding other suggestions, the processes I've tried DO detokenise, but clearly different basics use different token codes, so the job needs doing with something that uses the correct token values.
I'll start a new thread here.
Geoff