M3-DS Real - Trying to run Sega Genesis roms - Which emulator/how?

Hi,I'm trying to play a few Sega Genesis (maybe other systems as well....those will be later on) on my Nintendo DS Lite, with M3 DS Real.I downloaded the newest 'firmware' (? - maybe update....now I can play the rom of Mario/Luigi Bowser Inside Story) and put that on there.I noticed the roms are in .7z format. A quick search shows that those can be used by getting the newest winRAR, correct?Once I download the rom(s) desired, what emulator do I download and how do I add it + rom(s) onto my card and play them?Thanks a lot!

I use JenesisDS (I think that's what it is called)