My friend, whose iPod I was going to jailbreak soon, accidentally upgraded to OS 4.0.2. They have a 8GB 2g MC model. Since this person is "normal" and knows nothing about stuff like SHSH blobs, etc, they did not back up their SHSH blobs. Is there any way to downgrade their iPod Touch MC to 4.0 without SHSH blobs? Thank you.