new site name .....Typlo please help me

thanks to FORUMOTION i manage to build << http://olympicvillage.webmmorpg.net/forum.htm >>
it was very easy to build it ...but now as i was thinking for a new name, i decited to get the www.cu4.gr
is it possible to change the name of my site? i redirect www.cu4.gr to respond to http://olympicvillage.webmmorpg.net/forum.htm ..
Can you help me to change the name of the site ! a lot of people confiused how to found it ?

thanks in advance

yours

vassilis