[Doo]

Without testing...

Generate the random map and start a game with any settings, its not important at this point. Quit the game.

Go into your Saved Games folder. Find the .map file for the map you just created, for example if you called your game Fishgame then it will be called __Fishgame__God.map

Move this .map file and the corresponding .rgd file (eg __randommap__Fishgame.rgb) into the general map folder (eg C:\Dominions3\maps).

Open the .map file with a text editor (Notepad will do) and add in lines "#allowedplayer 15" for each nation you want playable. You will need to check the editing manual for each nations number. Save the file after editing.

Start Dominions 3, new game, select the map name and pick the number of random nations, it should only allow you to pick up to the number of nations you specified in the .map file. Play the game.

I should add you can do it this way but you can't do it globally (to the best of my knowledge). If you have a set list of favorite enemies save the list in a .txt file, then simply copy and paste it into .map files. This will save you time for each new map.