Custom DK64 FB image how to:

- Open BizHawk + DK64
- Ensure "Copy framebuffer to RDRAM" (or a similarly named option) is disabled
- Reboot core (if necessary)
- Open ScriptHawk
- Call fillFB() from the lua console
- Load your 320*240 png file in the open file dialog that pops up
- Pause the game, start a file or take a photo to see it