Daniusoft DVD to PSP Converter has a simple and easy-to-use interface and it also displays some instructions on its main window when your first run it 

You may also configure the video and audio settings of the output file (resolution, frame rate, bit rate, encoder, sample rate, channels, etc.) 

Seeing the properties (audio, video, etc) of the loaded file is also possible with Daniusoft DVD to PSP Converter