reset username?

[fungi]

My computer "automatically" recognizes when I am typing certain things (like my email address) and helps out by completing what I am typing. When I originally registered I wanted to set my username as "fungi" (which is part of my email address), not my entire email. Unfortunately, I am now registered as fungi@uwyo.edu. When I went to try to change it or to register again under a different username, the cnczone database found that my email already exists, so it blocked me from any changes. Is there anyway to reset my username but keep everything else the same?
Fungi

[CNCadmin]

ya happy now??

[fungi]

More than I can say!

[Turned Horizon]

Likewise i would like to change my username, can someone help me with this? I'd simply like it changed to 'Gavin' or 'Dr T' if possible