What I mean by that is a rom that I renamed to work in 3DNes, nothing more than that. Still not sure what to do about the Grey-screening issue...
why do you have to rename a rom file? For example you have a rom: smb1.nes and a 3d patch mario.3dn, just put the mario.3dn in smb1.nes folder and rename it to smb1.3dn. Launch 3DNes then open the smb1.nes everything will work.
