This guide was originally posted by /r/TeamZebra but has since been deleted.
The original post was located at https://www.reddit.com/r/miniSNESmods/comments/74trqo/not_noob_friendly_how_to_dualboot_the_nes_classic/
So I've been tinkering for the last day or two and I've finally gotten my SNES Classic to be a "dual-boot" sort of system, housing both the SNES Classic and NES Classic menus/ROMsets. This guide will walk you through being able to do the same, and at the end, you will have the official NES Classic emulator, ROMs, menu, screen filters, etc. loaded onto your SNES Classic. There will be a menu item in your SNES Classic called "Switch to NES Classic", and there will be a similar one to switch back to SNESC in the NESC menu. Both systems have full menu support, save state support, etc.
NOTE: This guide is NOT for the faint of heart / non-technical, and you will need to be able to use a hex editor, be comfortable with FTP, and know how to revert your console back to stock if you mess e