http://forums.macrumors.com/showthread.php?p=4663201
for the 1.0.2 files
http://spr33.co.uk/wp/archives/downgrad ... re-102-101
this link shows how to downgrade it. it shows how to downgrade from 1.0.2 to 1.0.1 but just follow the same steps to downgrade 1.0.2 from 1.0.3