If you're making a portable you probably need something to watch it on. (Unless you want to guess what's happening in the game, but I wouldn't advise that) Anyway, this forum is your "Hacking a pocket TV/screen" one-stop solution. Share your experiences and knowledge here.
it is a PSone screen but it's a differen kind. you can tell if the one you're looking at is the same as an official one if it has a circle shape around the screen and VOL and BRIGHT buttons in the same places.