Navigate to your downloads folder and select the PS3UPDAT.PUP file you just downloaded.
Setting up RPCS3, the premier open-source PlayStation 3 emulator, is the first step toward revisiting classics like Metal Gear Solid 4 or Demon's Souls on your PC. Unlike many other emulators that require a "BIOS" dumped from your own console, RPCS3 requires the official (firmware) to function. ps3 firmware download rpcs3
Once the download is complete, follow these steps to get the emulator running: Open . Go to the top menu and select File > Install Firmware . Navigate to your downloads folder and select the PS3UPDAT