If you are looking for a fast, high-quality program to transfer movies from your computer to your PSP, take a look at PSP Movie Creator. PSP Movie Creator's not much to look at, but it is fast and has a great selection of audio and video settings that will make sure your video is perfect for your PSP. At the most basic level, you open a movie file, pick one of the 6 crop options above the preview window and press (confusingly) Record It. You can then save the file or transfer it immediately to your PSP. There are several features that make PSP Movie Creator a comfortable program to use. You can convert and transfer batches of videos, and there's an auto-shutdown option so you can leave your transfers to finish without actually being there.
Combine this with the easy crop options and good-quality output, and PSP Movie Creator is a great option. The only problem we had, in fact, was that the range of video formats that the app supports is a little limited.