All you have to do is set up the league. Then whoever wants to join can sign up themselves. Basically, you're the comissioner. Its real easy to set up. The only thing you have to worry about is the scoring system(hr, avg, sb, hits, era, k's,walks, etc). For that, you might wanna get feedback from everyone in the league to make it interesting. Any other ques. let me know... I was the comish for my league last year.