Create a .cfg file on your gamedata/base folder of jk2.
How ?
Create a txt file, call it "tag.txt"
In it, write :
seta name ")>SoL<(~Kyle Skylark"
add the colors with codes :
^0 black ^1 red ^2 green ^3 yellow ^4 blue ^5 cyan ^6 pink ^7 white
Then save your txt file, and then rename the file extension ".txt" to ".cfg", so now it should be "tag.cfg"
Then ingame, open console, and do "/exec tag"
and then magic, you get your name !