well iv got it to unlock the modes useing the demo executable within the full game folder, iv hex edited alot of values but im still missing a few values when u try to start a game from within the game it bombs cause i believe somewhere else within this exe its pointing towards some demo files, the exe has everything the full game has just pointed to differen't paths here is a link, test it out and then hex edit it and see if i missed something. make sure u extract this and run it in your full game folder not in the demo folder.
http://home.comcast.net/~rynet/Worms4.zip