Universe Creator v1.3 lets a Stars! host remap the stars in a Stars! game to correspond to a bitmap, and move around the single stars afterwards (though only in the north-south direction). Download UC13.zip (288 kb), unzip it to a directory and run UnivCrt.exe. As a little bonus, I have also included two batch files that are useful when creating a remapped game, a game definition file and a text file explaining their use.
Universe Creator v1.3 was written by AK.
