N64 & Genesis Emu questions

[infidelity]

I've got two questions, (Quall999, you don't need to answer this if you odn't want to, ok buddy, lol lol) But I am looking for other peoples answers and sources on these 2 issues.

1st. I'm a huge Sega fan. I have the the Dgen v4 emu for the xbox. It's ok, but it won't run half of my games, and I know for a fact that it's not the roms that are the problem. Ex, Mortal Kombat 1, Contra Hard Corps, Sonic & Knuckles, NBA JAM, Whip Rush, Double Dragon, and a few more, won't work at all. Is there someone working on an updated sega emu?? or, could someone teach me on how to turn "Genecyst" (the best emu for the pc) into a emu for the genesis??? Every other emu for the xbox, snes, atari, nes, gb, gba, mame, are so great, but they're slacking on the genesis. Please all incites will help

2nd. I was reading a thread about a n64 emu for xbox, called n64-x and someone mentioned that Mario 64 ran great. Where can I find this exact emu this person is using??? I would like to see how a n64 looks on my xbox. Please, please, please help me, I'm really more interested in the genesis dept. Thank You for taking the time to read this long thread. Thank's