i would like to see what textures where used in a game (mushroom wars), so i unpacked pkg file and i think i found a file which contains all the graphic (it was in USRDIR\textures.ga, you can look at it http://dl.dropbox.com/u/17154326/textures.ga).

So my question is: Is it a standard file for graphic for ps3 games and if it is so, is there a tool that can help me to extract textures from this file?