So, one day, on my journey across the internet I stumbled across the Angry Video Game Nerd. Props to him for being awesome, he inspired me to look into the idea of an NES, so google was my friend and I found a f***ton of ROMs and emulators, trying one of them made me even more eager to aquire a good'ol NES
I can get one cheap with three games (World Cup, Kung fu and what I presume is Tetris)
Sadly it seems a bit annoying to aquire different cartridges to get the full experience, so my thoughts drifted to a flash card/cart like the R4 on the DS. You put your ROMS on an SD card and enjoy.
After looking around for a while, I found one, the Powerpak. The price (135$) seems too outrageous for something that serves so simple a function. Then I looked around for mods that accomplish the same thing but could not find a proper one and I'm trying to avoid knock-off BS.
Then I thought of making my own, and registered on the Ben Heck forums.
I'm thinking the process itself should be simple enough, from what I gather, a standard NES cartridge has 2 roms inside. One rom is used by the CPU and contains the program and the other rom is used by the PPU (Picture Processing Unit) and contains artwork.
What to do with this I don't know, which is why I came here

. Support would be greatly appreciated on my first serious electronics project.
To make this understandable for internet trolls:

kudos to MS Paint
I realize theres a software side to this, which will probably come as the crushing blow to this unlikely project.
Recommendations regarding the aforementioned knock-offs are still welcome though

Thanks in advance