Help ripping .pac file to get sprites from Trillion: God of Destruction (PC)

[pandaemang]

I'd like to start off here saying that I've never actually ripped files from a game before but I'd like to at least try. In particular, I'm after the 2D Dialogue portraits and backgrounds in Trillion: God of Destruction, the PC version since that's the only copy I have.

Here's an example of what I'm referring to:

Spoiler

I've tried googling and looking all over the place trying to find a sort of extractor for .pac files but every program I've tried just doesn't recognize the .pac files.

There we're a few .pac and .cpk files in the data folder but I'm assuming the main files I'm looking for might be in these files:
GAME00000
GAME00001
GAME00002