The best way to run NeoGamma is to make sure that you have the most recently cIOS (which is now rev14), and keep the app on your SD card to be launched through Homebrew Channel. As far as a NeoGamma channel goes, I recommend a forwarder channel, that way you won't need to remove then reinstall a different .wad when a new version of NeoGamma comes out.
So, yeah. Hopefully I'm not the first to say this:
There is a search feature on this website that is in so many ways amazing.
And by that I mean, that most people will get kind of angry if you post something you should have searched for. Unfortunate, yes, but there really is no need to ask questions that have been, for the most part, already answered. I believe you are looking for this: