I know this is an old post . In case someone's looking up , Do as follows:
click the “Customize” button and Untick the " Do Not Install-Bootloader " option under Boot-Loader tab.
hope this helps someone
@tdtech959 Without any pictures of kernel panic it is really hard to debug, but anyhow have you installed whatevergreen.kext with lilu.kext
i had a weird kernel panic when my onboard graphics was turned on, I was able to select external graphics card via BIOS settings as default.
are you sure if the USB is the actual problem.