I have tried for several hours with several different boot loaders on 3 different flash drives to get my Dell Latitude D630 to boot via USB . So far, all I am getting is the laptop to tell me a message to the effect of, "No Boot Sector on USB Device." It then tries to load Windows Vista, which displeases me severely. What do I need and what do I have to do to these USB flash drives to get them to have a boot sector and boot a boot loader? I am attempting to install OS X 10.6.3