You can get to the configs from the launcher. You look for the modpack you want to change, you press the "edit modpack" button. A window will pop up with a list of mods, you select GregTech. From there I think there is a button for the configs.
I wanted to join because I like SMP but don't have any Ultimate servers so I thought this would be cool.
Plans/goals: SUCCEED, build & make cool stuff.
I know alot about the mods but don't have too much experience actually doing it.
I dont have voice chat programs.