If you are setting up MGS4 today, do not skip the IRD step. Find the correct patched file for your region, apply your mods, and experience Snake's final mission the way it was meant to be played—smooth, fast, and uncut.
In short: ignore the hype around MGS4 patched IRDs unless you have a very specific technical need. Stick to verified retail dumps and let RPCS3 or webMAN handle the rest. mgs4 ird file patched
Download the IRD file that matches your game's ID (e.g., BLUS30109 for the US version or BLES00246 for Europe). If you are setting up MGS4 today, do not skip the IRD step
patch files and careful sourcing of IRD archives. However, once successfully patched and rebuilt: Metal Gear Solid 4: Guns of the Patriots - RPCS3 Wiki apply your mods