1. Cover art from Burnout Dominator looks to be from PAL version. My US copy is rated E for Everyone with the NTSC U/C in the upper right corner. It has the phrase "Battle Racing Ignited" right above the Burnout name on the box.
2. Mortal Kombat Deadly Alliance is rated RP, rating pending, where as the final released box art is rated M for mature.
3. Final Fantasy XII Collector's Edition and Mortal Kombat Deception Premium Pack box art images are JPG's not PNG's. I know OPL can utilize either format, but I didn't know if you were trying to stick strictly with PNG's or not for the site.
4. No covers for any of the Price of Persia games.
Other than that the site has pretty much all of the box images of my current collection of PS2 games. Sorry, if I raised a ruckus.