Due to copyright regulations, direct links to ROM files are rarely hosted on mainstream guides. However, you can find the Spanish CHD version by looking in these specific communities:

Most modern emulators (DuckStation, SwanStation, Beetle PSX HW) support CHD natively. The Legend of the Spanish Dub

Sites dedicated to the "Español" gaming community often host high-quality conversions of PAL-S (Spain) discs specifically optimized for emulators. How to Use the Disc 1 CHD Once you have located your link and downloaded the file:

Since Metal Gear Solid is a two-disc game, it is highly recommended to create an .m3u playlist file. This allows you to swap to Disc 2 seamlessly when prompted by the game without losing progress.