How can I play NES games

I asked before but nobody helped.
Please, I just want to know what the best way to do this is.

 

hereis the nes for nintendo ds emulator.

 

I have downloaded the various emulators and placed them in my m3 ds simply, but I am still unable to play any .nes games or .smc games, how do I convert these to play on my DS?

 

well put it in the same folder as the nes emulator then select it from the rom selection menu

 

you first run the emulator, then after that you select the nes rom.

 

Yes I kept all the files in the same place with the emulator, and I understand how to run it, I can play the roms fine on the computer, but not on my DS. The files & emulator don't even show on the Nintendo DS. Don't I need to convert the files somehow to .nds?

 

the emulator file should be a nds. file already. you run the emulator like you would for any other game.