I like some of the more dance/trance songs (which is unusual for me) like 'Fire', 'Stratosphere' and 'Never Look Back' and when I looked in the handbook to see who they were by, none was listed.

So I was wondering if anyone knows who these songs are by, or know where I can buy or download them? Thanks.

You could go to Ares and search for the names, then download some until you have it.
Sort by genre.
Do you have homebrew?

By homebrew, do you mean making your own CDs? If so, Ive used Nero before to burn things to CD, like music or a cheat disc - Gameshark. But yeah, Ill check out that website, thanks.

No it means you've hacked your PSP.
I'll try and get those songs for you out of the game

I tried, couldn't get the songs. I could, but they won't play.

Thanks for trying. Do you think, if I bought or downloaded the PC version, that all the audio files in the game could be accessed?

Yes. Yes I do.