Mine is bind DPAD_UP "exec omgyeahmyownpatchsicksxcsh.cfg"
In you 2nd file you would then put in all you codes for your menu and as up is not used for anything in the normal mw2 buttons it is all good
Then when you in game all your mod menu stuff will stay off till you turn it on with that one button also if you want to turn your menu off again just go into options and back out and it resets it for you
And that pretty much it
oh and also if you want you could add some little codes onto you first file like
now everything will be normal but if you knife in a game you will have UAV allways on and as most of you know you dont have to be host for UAV on to work