I believe those are the only places you can unlock, there may be a fourh hidden area but I doubt it. Ya know, instead asking all these questions you could go to Gamefaqs.com as they have plenty of walkthroughs to help ya. As for how to defeat Omega my strategy won't help ya since I had the Celestial Weapons fully powered; I just hit him with Auron and Tidus once or twice and he went down. I forgot to get Kimarhi's ultimate blue magic spell - Supernova or Nova (I accidenlty put Ultima, silly me.). Yeah I cursed Shai'tan's name that day.
The Ultimate Spy
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