Hi, i have a slight problem with my powerbook's hard drive at the moment. Before i transferred my iMovie project from my external hard drive to my powerbook, i had 44 gig of free space. I also made a dmg file of a prior iMovie project so i could make multiple copies. When i finished with both files, i erased them and secured the empty trash, but for some reason, i'm missing 6 gig of hard drive space, does anybody know why this is? Thanks