This has nothing to do with UnleashX, or other dashboards. You should have posted in the emulators section. It's easy to find - it's called "Emulators".
All emulators designed to run on the Xbox 1 will run on your Xbox. Are you asking for a list of emulators, or instructions on how to copy an emulator to your Xbox? Either way, read the stickies and some of the last year's posts in the Emulators section, you'll find that 99% of your questions have already been answered.