I just wanted to add to my previous post.
You don't need the Sigkey in the resign entry.
Also to get maps to show up correctly in your map pool, you must use brienj's tool to patch the default.xbe AND the ige.xbe.
ige.xbe = In Game Editor.
Since there are 2 executables, it's a little tough to figure out what's signed from which xbe. I'm assuming all the maps are done ONLY by the ige.xbe and the user profile is done ONLY by the default.xbe
Alot of this stuff is trial and error. If I have some time to kill, I will dig a little deeper to see what I can find.