Wow, I just found the FDS Loader project by Brad Taylor. Incredibly easy to build, it seems all you need is a 25db connector, some wire and an edge connector. I'll be trying to find a FDS RAM cart.
My question is, has anyone here tried this? What were your successes?
Do all the best FDS games work?
I'm considering buying a couple Game Genies to "extend" the connector out the NES along with my custom Famicom/NES converter, I should be able to plug in the FDS RAM cart into the front, without taking the cover off.