Just a quick TUT here: I'm sure you have been in a game lobby with players whose names are multicolored. Now you probably thought something along the lines of "I wish i could do that but i bet they had to pay for it "
Well i bring you the good news that they in fact DIDN'T pay for the name color change all you have to do is this...
1. Open up CoD MW2
2. On the main menu open the steam in game client
3. Go to settings
4. Under settings go to your name
5. Depending on what color/s you want your name to be put a ^ with any of these numbers: 1234567890 before any letter in your name, this will change the color from that place onwards.
NOTE: you CAN put more than one color in a name, just put the ^ followed by the number before a different part in your name.
HERE IS WHAT EACH NUMBER STANDS FOR: