I discoverd that the DOCUMENT.DAT file is the instruction manual for the game! I think all u have to do is save ur instruction manual images as .png open a hex editor and place each image's hex code in one by one in the correct order. I'm going to test it right now and will edit w/ my results
I tried it w/ .png and .bmp and both didn't work. I think they use a sepcial pic format or like Mister Chief said it's encrypted.