You can't. Only a Moderator can.
Send a PM (private message) to Avatea with your new requested name.
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The name itself, I can't see changing.
But the 'B' I can. 
August 31, 2012. A Day that will Live in Infamy. Or Information. Possibly Influence. Well, Inf, anyway. Thank you, Paragon Studios, for what you did, and the enjoyment and camaraderie you brought.
This is houtex, aka Mike, signing off the forums. G'night all. - 10/26/2012
Well... perhaps I was premature about that whole 'signing off' thing... - 11-9-2012
I just registered for the forums...and uhmm I can't find it and tried searching for the answer but:
How do I change my forum user name???
Any help would be greatly appreciated