I am using an HP Probook 4540s which currently has Ubuntu 12.10 on it. I hit escape to go to which drive to boot from, and when i manage to choose the usb I get something like "Insane primary partition (mbr) I cant find myself from what you are trying to boot from. boot:" Where do I go from here?
Try using dd to send the iso image to usb drive
Is so important that add the bs=8M to make it work! And check that /dev/sdb is the device where you have the usb flash drive do it with