Well I know some people will come in here and say not possible. Well you might just be wrong. Mana Khemia a PS2 game was released a while back for the PSP don't get me wrong here without installing the game to your memory card it did run kinda slow. Now, after waiting a bit longer Konami is soon to be releasing a port of Shadow of Destiny out on the PSP in Japan and no idea just yet if it will be released here. Here is a nice lovely link to the article.
To die for: Japan getting Shadow of Destiny PSP port
Now I wonder, with a few edits possibly some more PS2 games could be ported over like low-end graphic ones.
Thoughts and comments please.