Hacking WII DVD (-ISO) HEADER Descriptions

[CrazyDogg]

Has somebody a Link for me with WII ISO-Header Informations?
Or is here someone, who has experience with this stuff?
At this Time I try to develop a Tool which detects Updates on a ISO... and partly it works... but I need more informations about the Header... mainly offset 05x8000 and 07x0000 and maybe the three Bytes at offset 05x01E3 and 05x0453 (UPP, UPE, UPJ or UPD) !?!

hope someone is interested... and has some helping informations

thanks