Need Help Finding Things From Game Files

I've been using the ASF2EX to look through game files and there are somethings I can't find from both the 2nd game files (pink outline) and extend game files (blue outline). So I need help with that so I can make them into custom dlc. Another thing is a way to look at the first games files that's in .asf format (green outline) since it doesn't work with ASF2EX. And all of this is about the 3 PSP games.


First, the only thing I can't find from any of the 2nd game files are the 2 camera files for Cantarella. The camera files look like this 'RTS_00_c00_01C.igb'. And that one's for Romeo & Cinderella.


The other things I can't find are the diva room items from the extend game files. And the 25 items circled below are the ones I'm looking for.

 

Ok, I now have discord on my computer, but do you know what the server is called? I've joined two servers called ProjectDIVA.net and VOCALOID. I just want to make sure that I'm doing what you said right because I didn't get much when I looked up 'Project DIVA Modding'. And I'm a newbie regarding discord. But on the ProjectDIVA.net server, there's a page for modding and the 3 PSP games.

 

Got it now, thank you ;)