✔ 最佳答案
Okay, I have ome ideas for you! First you may use limewire( is a software to let you download video, music, photo or more) to get the LIMEWIRE BASIC( you need to pay for LIMEWIRE PRO) it is free download!!! website:
www.limewire.com
Or you may use FOXY(for you to download psp, nds game, music,video((video in foxy are more than 80% are not mp4))) website:
www.foxy.com
Go to the website of sony psp you may see dowload or you can go to the network update(if you upgrade 3.50 you can't play download game any more) in your psp but I think 1.5 is good for you!!!
Because psp can only play mp4 video so if you have download some video are not mp4, you may use some software to convert or a website for you to convert for free:
http://media-convert.com/convert/