Step1 Install PS1 emulator core.

1."Main Menu" "Manage Cores" Choose "PCSX reARMed" Click "Install Core" That's it.

2.All you need now is to load your game through "Load Content".

"PCSX reARMed" is a very basic emulation core that doesn't have too many options, but it is easy to start and work without PlayStation "BIOS" image. For more advanced options you can try "Beetle PSX" Core, which has a lot more features and video enhancement settings, but it requires a BIOS file.