These mods are not GTA V. They are superficial reskins. Installing them requires patching the real ISO using tools like UMDGen. No one is distributing a full “GTA V” modded ISO on MediaFire that works—those links are either dead or scams.
GTA: The Trilogy – The Definitive Edition (Available via Netflix Automation or direct purchase) gta v ppsspp iso file 7z top download mediafire