Needed Tools:
-GCRebuilder
-Yaz0Dec & Yaz0enc
-ArcPack
-RarcDump
-Super Mario Sunshine Bin Editor (Made by Miluaces)
-BMDCubed (Made by Gamma)
(LINK AT THE BOTTOM)
Extracting and rebuilding your Root Folder:
Open GCRebuilder, then go to Image>Open
Then select the disc icon named "root" then...