Question: After messing with the config file to
change my name when I use alt+tab or windows key I cant
minimise my game online any more.
Answer: Try doing as follows:
Alt-Enter to switch from the game to windowed mode...
then alt tab between programs.
It's been known to not work otherwise.
If that still doesn't work then turn off programs such
as winamp. The winamp skin can sometimes interfere with
desktop display.
You can't Alt-Tab between your game and the windows program
when running the game fullscreen. At least pretty sure I've
never been able to. To test if you can you could also try
to just have CoD *fullscreen* and notepad open and try to
Alt-Tab then, probably won't work though.
Best to only switch when running CoD in windowed mode though.