Curly, for Modern Warfare 2 you can try putting this command directly into the config file (steamapps/common/modernwarfare2/players/profile_name/config_mp.cfg), after editing that file don't forget to put Read-only attribute.
The other way - is to make it toggleable. For this purpose simply find the key that is not used (for example, 0, 9,
and add ths line
bind 0 "team_indicator 3"
Then, whil playing, you press the 0 button and get modified indicators (if, of course, this command is supported by Modern Warfare 2). If you want to have a possibility to restore original indicators - add
bind 9 "team_indicator 1" - so that when you press 9 key - the indicators will be set back to default. Once again, when you finish editing CFG file - put Read-Only, otherwise the game will reset all the changes you have made.
As for Call of Duty 4 - this command doesn't seem to exist in DVAR list. Still, the name colors, just as the team logos, are fully customazible. The way to customize the color of the team and player names, alongside with team names, was described in the "Reason of ban" thread.
