There are some conversion tools you may need for some psx .iso and .bin files. Unfortunately the only place I know to find it is on a rom site, so I can’t give out the link here. It’s to convert the .ecm games. There will be a file named like blah.bin.ecm for those games. Look for ecm tools on google.
You only need one file for psx games, you don’t need the .cue file.
^^ my other hobby