Instructions
Download and burn PS2 BIOS Dumper, then insert the DVD into your PS2. Attach a flash drive to the PS2's USB slot, then turn on the PS2. When you see the message "Dumping NVM Completed," detach the USB drive. Copy the *.bin files to a folder on your computer.
Download and install PCSX2, then open the program to get the initial configuration screen. The default plugins should be satisfactory.
Click the "BIOS" tab, then click "Search" and select your BIOS *.bin file. Click "OK" to complete setup.
Insert a game into your computer's optical drive, then start PCSX2. Click "File," then "Run," then "Run CD/DVD." The BIOS should load safely, displaying the PS2 splash screen, then the game should run.