I had a great pleasure to delete the 2 first movies from nfs shift, which annoyed me quite a lot since I play it a lot

Simply deleted with xexloader and voila, as if they never existed

Have sometime lag ingame, at the begining of a race. This seems related to the race itself (combination of cars and track), as it is consistent 'til I reboot the console or if I try another race. Maybe a bad media @ copy time, did not take the time yet to do and extraction from the iso. The game is copied on internal 120gb, and is no more hdd installed with the dash. It's not game updates since I removed all of them. I can't remember it there was an update on xbl for this game.
So I'm not fixed yet as the cause : media, xbreboot, jtag with diodes ... seems gpu related (and so is jtag...) but a little random!
But I'm still happy
