Based on the filename you provided, you are looking at a ROM image of specifically the Spanish language version (Spain) , Disc 1 , and a Rev 1 (Revision 1) version.
It sounds like you’re referencing a specific file for a PlayStation 1 Metal Gear Solid disc — likely from a ROM set (e.g., Redump, TOSEC, or a curated emulation collection). Before diving into a technical or preservation guide, a few important clarifications: Metal Gear Solid -Spain- -Disc 1- -Rev 1-.chd
Please let me know if you want me to continue with more information. Based on the filename you provided, you are