Offset Type/Size Purpose
0x00 12 bytes PSAR Signature - always is the string "PSISOIMG0000"
0x1B DWord Offset to the second part
0x400 11 bytes Game ID in the format "_????_#####" (?=character, #=digit)
0x800 Start of TOC information (see TOC for more info)
0x122C 128 bytes Game Save (if the text is too short, the remaining bytes are null)
0x4000 Start of ISO Indexes (see ISO Indexes for more info)
0x10000 Beginning of ISO - note the ISO may be padded with null characters