I'd type in the exact game you're searching for and add "script" to the end of it. Generally for popular games, someone will have written up a script, but with iM@S I'm not entirely sure. Worth a shot though, it's how I looked for what was said in the Ace Attorney series!
Either way, seems I missed out on parts of the PS3 iM@S 2 demo the first time, so I'm redownloading it now. I also got the English patch for iM@S SP, and despite being quite incomplete it allows me to play in English so it's quite nice.
P.S.
Here is a guide and overview for the PS3 demo, if you're having trouble.