HI everyone...
Have you tried launching kali, going into "application/system tools/install Kali linux" ?i haven't find yet any multiboot usb creating software that supports the "install" menu for kali. i think best option is tha win32disk software the one i test and works
Plus, for all those who are experiencing trouble with live USB, try this method (you can replace "ext2" by "ext4" during the creation of the partition: http://forums.kali.org/showthread.ph...highlight=ext2
Let me now if it helps