NesterJ too fast and choppy!

[AkiraJkr]

I recommend that you instead get a separate emulator. You can't expect installing a module inside another module, and trust that the one inside will work just like you wanted, because that module wasn't made to be inside it.

TL;DR: The performance/graphical impact of emulating on a emulator is not worth it on the long run, and you're better off getting the separate emulators, or using RetroArch.