Playstation 2 emulator for your PC

Looks like there's a free Playstation 2 emulator available for your PC. What business does a Playstation 2 game have being on your PC you ask? Well...umm...you do back up all of your PS2 games on your PC don't you? That's the only way I would think you'd be able to get a PS2 game on your PC. Honest. By the look of the posts on the forums and the screenshots, looks like it works pretty swell...for you backups that is.