PS3 Where does Webman stores or reads it's covers from?

[Strizay]

I already explained it. You only can see PIC1.PNG inside the ISO when you mount the game.

Maybe you want to explore this method. It shows PIC1.PNG like PKG games.
https://www.psx-place.com/resources/webman-classics-maker.995/

I did try that application. If you go to the last page of the discussion, you'll see that I was having problems.