I've made a parts List.
1 iPod Touch
1 NES Controller
1 Cereal Box
1 Pair of Scissors/Scalpel
1 Incase protective cover for iPod Touch1. Dissasemble the NES Controller and remove the Buttons and Rubber
2. Cut the Cereal box so that it slips into the Incase cover, and covers the button area, but keeps the screen area clear.
3. Mark on the cardboard where to cut the Button Holes
4. Cut the button holes
5. Place buttons underneath cardboard so they stick through
6. Place Incase Cover on
7. Boot up NES Emulator and check it works.
When i get my Incase Cover, i'll show you what i mean, but unless someone makes a full screen mario bro's NES Emu on the internet for iPhone and iTouch, i wont be able to do a POC.