I think its impossible to remove the hack while recording
if you record with xfire it wont show the box's i have tried with fraps and camptasia still see box's so i tried xfire and nothings their because it uses xfire for the radar actually so just record with xfire and it will be cleaned hope this helped
Frosty snow cone or whatever posted my tutorial on recording demos.
You don't nessecarily need to do the demo part unless you absolutely want the best quality (you can use fraps instead). But you have to record the demo -> then fraps the demo later in playback..