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.