well, if you're talking about opening a game-specific file format, you'd probably need a special tool for that to convert it into png or other pc format. i don't think you can do it with jpcsp.
it could be probably substituted if someone implemented an option to dump any textures/sprites/images visible on screen into a folder (which would go along with the other idea i suggested sometime ago to dump 3d scenes into an obj file or such), and then get to the image you want in game, but that's nowhere the top priority.
it could be probably substituted if someone implemented an option to dump any textures/sprites/images visible on screen into a folder (which would go along with the other idea i suggested sometime ago to dump 3d scenes into an obj file or such), and then get to the image you want in game, but that's nowhere the top priority.