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Use an emulator for PSX games. PCSX2 is a PS2 emulator.
I believe there is more than one core you can use in retroarch, and there's also epsxe. Although there are other outdated emulators those two options are the best.
PSX games are CD based and a lot won't run properly in iso form due to multi tracks, better to use something like bin/cue format.
Spoiler warning:
Alright I got a new emulator and got what I wanted working. Thanks a lot for the heads up!
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