Not possible. In game ad dons cannot interact with out of game programs, well they can but only via saved var files and well it wouldnt work for what you want.
But i use a program called PlayClaw.
It records like fraps and has overlay's for video file, fps, teamspeak and vent, as well ac video card and processor load and temp. Very easy to use. Record the video, drop it into vdub, convert it and upload to youtube. I make full 1080p recordings with it.
Sample Video.
http://www.youtube.com/watch?v=3NGvvYB7_SM