I was organizing my PS2 and PS1 games on my PS3 and adding covers.
What I quickly noticed was that you can only use JPGs (which means no transparency) for PS2 covers.
While PS1 games support both JPG and PNG covers (with transparency).
It's not a critical feature but it would be really nice if you could add PNG covers with transparency for PS2 covers too.
See pic: Attachment 44730