I've backed up my YUGIOH GX Tag Force game and it came out to be around 815MB ISO. i used iso->cso by danny_1710 (somthing like that) version 1.4. When it compressed it, the file came out to be 600MB. Now, what im very confused about is, my freind has the same game on his memstick, but his is only 288MB. same game, same runtime. What is going on? and yes i choose level 9 compression. is there somthing else im doing wrong?