I am starting a series of oblivion walkthrough videos and i am wondering is there a way to record your voice while playing the game? I'm using xfire to record videos now and i voice them after. So is there a way i can possibly record my microphone while recording the game?

Have you tried FRAPS?

Yes, I do not think it works the way I want.

How are you going to make a walkthrough on a game as non-linear as Oblivion? Are you planning to do the MQ only or a number of side quests as well?