As everyone has said, Gamefaqs is an excellent site for lots of games. Even if you don't find help in the faqs/guides, you can alwasy look at the message boards too....but you'll have to register to post a message asking for specific help that's not been posted before.
Anyway, back on to FFI for PSP.....I'm going to buy this game (even though I have the PSone and GBA versions) when it's released in UK. Shame they haven't re-released other FF games for PSP.....but as I have a DS as well, I'm hoping to have all the FF games I can get.
