Hello! I found a winterboard.ipa file on the internet and I´m trying to install it via Itunes onto my ipod touch with OS 4.0.2. The ipod is not jailbroken and I want to instll my .ipa file of winterboard. Itunes only says: The program "Winterboard" was not installed on the iPod "Ipod name" because it is not signed. Are that any way to install it without jailbreak.