I'm trying to convert the BIN roms from Nes Remix 2 to NES format. (I can send you the files if you're interested)
The error I got most of the times, running on FCEUX is: "FDS BIOS ROM image missing: (Directory)\FDSBios\disksys.rom" "An error occurred while loading the file." For any ROM I try to convert. I'm using Python 2.7.14.
I'm searching specially for Super Luigi Bros.
EDIT: I changed the Python version to python-3.7.0b1-amd64. Still, when I load the rom to FCEUX the screen freezes to a grey color.