im not scripter and im cant make gamemodes

and im having idea to make gamemode looks like team fortress 2.its game were you war with diferent class and team.you can find it on youtube here http://www.youtube.com/watch?v=DOyngQva ... re=related at enginer you can build dispenser and teleporters and sentry and its upgradable objects.
i cant make that gamemodes beacouse im not scripter.maybe another people in this forum can help to grow that good gamemodes