You use this DAT file with a ROM manager. Two of the most popular are (for Windows) and RomVault (cross-platform). The process typically works like this:
You have the archive. Now what?
Emulators like PCSX2 work best with uncompromised data, reducing glitches, crashes, and compatibility issues. ps2 redump archive
When browsing these archives on sites like the Internet Archive , you will typically find: You use this DAT file with a ROM manager