But, nothing will be 480p unless it is a PSX/PS1 game (either doubled ressy when you record or original 320x240 then doubled wit AviSynth) or some Arcade game (mainly vertical shmups). I don't believe there are any NES games (or games at that) that are 240x 180.
Final NES game resolution is 512x448.
If you mean render as in throwing it in something like Sony Vegas, it will automatically be rejected. You use the tools we have here (MeGUI, Avisynth).
One of us could encode it for you. You could upload it to a filesharing site. But, before we get to that point, you should go to the IRC and ask for assistance. If you can encode it yourself (from what I read, rendering =/= encoding), then none of us won't have to encode for you. ;)