my 6 month old macbook froze today while looking at the net so i used the hard reboot and now all i get is a grey screen. no icon no nothing. i cant get to safe mode. i cant reboot from OS CD's. if i hold down the shift of C key for long enough i get a pic of a flashing folder with a ? in the center of the screen. any ideas of how to get my stuff reboot it and get my folders off the harddrive?