Did you update the game from the launcher?maybe you have to make a text file named DataFiles2238.cfg make sure it's a config type.In my text file, I haveC:\Program Files\BlackIsle\Fallout2\MASTER.DATC:\Program Files\BlackIsle\Fallout2\CRITTER.DATmaybe this will help
Okey i came a bit further now, i actually came ingame now, but most of it was black i didnt see verry much and then i couldnt see my mouse either...
the blackness is the world map, you have to explore it.and about the mouse, idk about that