The developers of EjPSPReader have just released a new version of their homebrew application, used for reading the 'blue sky library type' (not quite sure what this is, but it's the best we could translate). The new version supposedly adds JPG and PNG support for the application. If somebody has a better idea of what this does, then please do reply. Anyways, good work, keep up the devving!

Download EjPSPReader v0.8 from PSP 3D
here.
Check out the official webpage for the homebrew
here.