The file found on Google Drive is a widely documented scam . There is no legitimate software called "PCSX4" that can emulate PlayStation 4 games on PC. Summary of the PCSX4 Scam
Besides PCSX4, there are other PS4 emulators available, each with its strengths and weaknesses. The choice of emulator can depend on personal preference, system specifications, and game compatibility.
PCSX4, like other emulators, requires configuration to run optimally. This includes setting up the graphics plugin, controller settings, and potentially tweaking game-specific settings.
With PCSX4 configured, you can now attempt to play PS4 games. Ensure you have the game files (which should be in a specific format compatible with PCSX4) and follow the emulator's instructions for loading games.