PCSX2 can load and play original PS2 discs. If you have a DVD drive for your computer (external DVD drives are easy to find), then you are ready to go. Simply place the disc in the drive and select 'BOOT CDVD' from the system menu.
Also, If you are still using PS2 discs and original PS2 hardware, check out our guide on how to play burned PS2 games without modding your console.