How do I change my username permanently?

[Milo Thatch]

I mean, I know how to change my theme (The Official Name Change Request Thread) but some people still call me by my old username (Mr. L rocks!), which I think is because they see it in my summary. Is there a way you mods can change my username in my summary to The Shadow Prince?

 

[Boo Diddly]

Uh, you could PM a Mod about it?

 

[Milo Thatch]

Oh. OK, lock this.