There is actually a hack out now that allows you to do this. go to the gunz hack downloads page and downlaod the hack from the thread, [Release]Vista Hacking <.< *GHS.dll*. Read the directions and copy and paste the hack. You will see a file that you put in there called szCharName, type the name you want in there and than when you log into a server on gunz, press 7 on the num pad for a girl char with that name, or 9 on the num pad for a guy char with that name. with that hack you can use alt codes, and make a colored name. If i helped ya, press thanks
Ijji Color hack??? 
Linear Mode
