Silhouette Stories PS1 PAK files

[AFruitaday!]

So what I hear from what a PAK file is, it's either a PS1 file that's found in multiple PS1 games or a compression system. What I discovered in the PAK files in this game is there's .ATI files stored inside the PAK file. This can possibly be the data (e.g. gfx or sound) that's stored in there.