Fraps has a option for mic recording aswell ...
http://puu.sh/3KZg0.jpg
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Fraps has a option for mic recording aswell ...
http://puu.sh/3KZg0.jpg
Should add, ticking that option makes the mic audio track be merged with the game track.
For editing purposes you should grab a second software for audio recording.
Say, like mentioned before, audacity.
Put the recording button of both programms on the same key on your keyboard.
This way you can avoid audio sync problems.