We had earlier agreed that I was going to release the next Project Plug and Play update. I have already started working on it.
You never replied to me originally...I meant more that we would do a collaboration effort, not that you would take over the entire project. Since you never got back to me I figured you changed your mind... (not trying to sound rude here, i'm just confused)
So...is the content encrypted ? I wanted to make a custom rom with official NES games in it , instead of bootleg ones, I noticed that the roms are saved in "banks" , I tried to replace one with Super Mario Bros. 3 but that did't work (I guess the mapper is unsupported?) perhaps with the emulator now I can try the edits before burning the eeprom
To put game inside a multicart slot, you have to match the game + graphics data in the correct place, with the correct size. Mario 3 wouldn't work because its a 384K game, none of which are inside the 240-in-1; Mario 1 would, as many games on the console are 40K. They also can only be mapper 0 roms.
to find the gamedata, take the project plug 'n play rom for the specific title, and search for the first few lines of code in FCEUX hex editor. then replace the code with the game you want in its place. do the same process for graphic data. (does that make sense at all? i'm terrible at explaining these things)
I've attached ROM with Abscondee replaced with Mario 1 as an example.
(also one more sidenote for NewRisingSun - the Nintendulator you posted won't run the majority of pnp VT03/09 extracted roms. is there a reason for that?)