Originally posted by techumseh
This tells the program to ask you for the extra maps when you start an Original game. It's preferable to begin using the Original game, because otherwise the scenario will always be either a Fantasy or a Sci-fi game, and they both have built-in quirks that can be maddening. At least with the original game, everything is still pretty much the same as FW/MGE - until you change it!
One more tip. Put copies of the terrain files for each of the maps in your Bitterfrost scenario folder, before you start, otherwise you won't be able to see the extra worlds. It once took me half an hour of hair-pulling frustration to figure out this simple error.