use a power player, theyre so easy to use.
edit: Oh so easy to use. I got a backup one and modded it completely in about an hour. It will take patience, That was my 3rd one. Dont be afraid to do what you have to do, and believe it will work. I didnt test the third one until it was all done, and it worked. Im not saying not to check it, I actually mean to take percuations on what you do. I had to move the NES every time I wanted to check it. Then it would end up breaking once I set it down, so I would have to bring it back over to fix, still not knowing wether it worked or not. so try not to move it around much until you can plop it in place and leave it there. the NES is just sitting here waiting for a screen.

and some money of course..
Making XNA Games in C#.