Riiiight.
Anyway...
Are you asking how to make a wish to summon the dragon? If so, you gather all the dragon balls in a small pile (7 balls total), then hit your "use" key. I think the default key is "b".
If you are asking how to run the "capture the dragon balls" mode, I believe the only way that can be started is when you are setting up the server. I have never heard of creating the dragon balls in mid-game. The only way I know to run this mode is to start a server thru the esf "create game" menu. There's a drop-down box that you may select from team, all for one, and capture the dballs.