135638 Online games - win real money

Hello, I am interested in running a site where people can compete in online games for a fee and win real money. The game or games should be simple arcade games. The developer can create a way to implement this to TrackMania Nations - a car racing game where you can compete online on default tracks or create your own tracks and act as a server for others to compete on your tracks. Players should be able to register making a payment. If they create their own tracks they should be able to offer odds to other players i.e. if "I win the race I get x amount if someone else wins they get x times 5 or times 10. If this idea cannot be applied to TrackMania then I need it applied to any other similar games. Even to a simple flash games site, where basically players register, pay a fee, play online and the winner gets the pot. It can eventually be any type of game - car racing, martial arts, shooting, even chess or backgammon.