I don't think there is away . I think you have to go to itunes
How Do I Unlock An Ipod Touch Without Connecting To Itunes?
I would use Professional I Pod Repair! They have to be the best guys in this categorie even though 25 bucks isn't the cheapest thing...
I don't think there is a way you have to take it to the place you got it from and they will reset it.
