After creating a no-intro hearderless nes set database, imported nes roms are majorly tagged as "bad name".
ROMCenter wants to rename ".nes" into ".pas"
Also description of nested folder (Protos and Unlicensed) seems off in this case.
Headerless nes no-intro set also requires an xml header used by ClrMamePro. No idea if ROMCenter needs it.