Hey you alright people, im having the same problem except, i tried to re-install both fallout 2 and the mapper to no avial, then i tried doing what you said about changing the master.cfg file,
Tried that and then i get a message saying that i need to insert the original fallout cd and that it cant find the master datafile,
Any ideas, i tried playing around with the path in master.cfg but cant seem to get it to work.
Hope you can help because this is really annoying me now, Cheers