Greetings Hugo. The game is actually released, just not the english version. Personally I feel left out, sorta.
If you wish to know more about playing PSX games on your PSP I could possibly help you. I have recently finished Suikoden 1 on my PSP which also prompted me to come here. It works perfectly
There are certain risks involved but they are minor. I too am waiting for the PSP remakes to become available in English because I can't really read Japanese and I'd like to replay them.
I could also tell you that there's going to be a Final Fantasy 1&2: Dawn of Souls remake for the PSP
Feel free to contact me.