When/were can you request a name change?

When/where can I request a MPGH name change? For example 1000 posts = name change from kamielftw to KamielFTW

I didnt say i wanted it to be changed like that!, just an example.

http://www.mpgh.net/forum/118-staff-requests/

after 1000 posts i think

You've been here since feb 2010 and so far today I've seen you try to get a 1k post ban,
and now this. You're pretty clueless yea?