um, make sure you have extracted everything from the .iso just fine, and that everything was copied over to the usb just fine and that you are not missing anything
you have to edit the bootinst.bat
look for a "-maf" and change it to "-ma -f"
there are two places you will need to change this, change them both
then run bootinst.bat
i had to do this to get bt4 to run correctly on my usb
good luck



