Viewing System Menu WAD Insides?

I got Wii Menu 4.0 ripped from my wii into a WAD file. I want to unpack it to see the system files, and look for a new exploit.

I could also do this with a DSi Menu and get other Nintendo DSi System titles using NUS downloader, so i could help DSiBrew

I believe it is a different format to most .wad's.

YOu can download the files with NUS Downloader....just don't tell it to pack a wad.