I just got a 16gig ipod touch and will purchase the 2.0 software upgrade. However, there's a chance that I may decide that I want the 32gig model if I find there isnt' enough space for my day to day use. If I return the 16gig and get a 32gig, is it possible to transfer the software upgrade (or get a refund) or do I need to repurchase it for the new one?