Looking for help with ripping Valkyrie Profile 2

[Natch]

Hey all, 
A friend and I have been trying to rip sound files from the PlayStation 2 game Valkyrie Profile 2: Silmeria. 
but neither of us is very knowledgeable about ripping games, and haven't had a whole lot of luck. 

We are mostly after the voice clips used during battles (start of battle, using special attacks, victory quotes, etc) 

So far the best I have managed to get has been some somewhat garbled/distorted/sped up voice lines from in game cutscenes. by using a program called Cube Media Player. 

If anyone could offer some guidance on how to rip sounds from this game, I would be super grateful.
Even if just some basic guides on ripping PS2 game audio in general would be nice. though help specifically with this game would be ideal.

EDIT: I also am currently attempting to use the program PSound to scan the disc. but that has been going for close to 24 hours at this point. I had heard that this method takes a while, but is this right or has something gone wrong with my scan. how long does scanning a CD/DVD typically take for PSound?

[Natch]

Update: After letting PSound scan for close to 3 days, I ended up stopping it with over 2,000,000 sound files found. 

looking through them though, it appears it's mostly environmental sounds, sound effects and voice lines from the game's cutscenes. 

so basically everything but what I am actually after. 

the files are also duplicated dozens of times each... 

with no sign of any in-battle voice lines.

back to square one I guess...

EDIT: a second scan with PSound only took a couple of minutes, and found 3700 files. but it was still just the same stuff as before, still no in-battle voice lines