Sony released the latest update of PSP System Software on March 28, 2007, is there someone who has updated to V3.30? u can click here
for further information. they say the latest version supports 720*480 files. I modified resolution to 720*480 in ImTOO PSP Video Converter manually, but unfortunately, the output file was abnormal. Maybe I can only wait for ImTOO to update its version.