I did everything, but after booting from a USB flash drive, the apple logo appears and immediately reboots. the opencore menu does not even appearI see what's wrong now, You have lost Kernel info for one of the kexts.
Whatever your using to edit the config.plist with is messing up the config that's if its not you doing it.
Download the EFI again and add your SMBIOS details, Remove the boot argument and don't do anything else and try again and use PlistEditPro or Xcode to edit the Config with.
PlistEdit Pro
PlistEdit Pro is a handy little tool to edit your Config.plist with among other things.forum.amd-osx.com