Comedian hacking a rom

Hi there,
I'm James. I'm writing a comedy show for the Edinburgh Fringe. Part of it is to do with video games and I'm trying to put a pixel sprite of me into a SMB3 for the NES.

To make it playable, I'm assuming that all I need to do is to recreate the sprite sheet here but replacing Mario with a version of me.


I already got some help on making some sprites from E-MAN on this board who did a superb job.

What I need now is to know.
a) Whether those are all the sprites I need to create
b) what format they need to be in to put them into SMB3?
c) Whether there is anyone on here who can help me edit the ROM to put them in there. I expect I'll be playing the game with OpenEmu.

Any advice, greatly appreciated.
James

veitch.me