Title says it all, I'm aware I probably can't request Extensions for a game only I run, so that's not my intent this time. ^-^;

But I was just wondering how you do it as there's nothing I can find on the site that explains how they're made. (Though, I may be missing something.)

If the game is part of a series, just ask the series mod. If the game is not part of a series, go through the request queue.