PS1 memory cards use specific header IDs.
: For games like Metal Gear Solid that span two discs, the best practice is to create an M3U playlist Create a simple text file named Metal Gear Solid (Spain).m3u Inside, list the filenames of both CHD files (e.g., MGS_Disc1.chd MGS_Disc2.chd metal gear solid spain disc 1chd work