I went from 2.1 leak with root to the 2.2 leak, but I reverted back to stock. When I went back to stock from 2.2 leak I forgot to wipe data and cache through nandroid before flashing stock 2.1. There haven't been any ill effects, but I still like to do it. Is there an easy way about this without re rooting, wiping memory, then unrooting back to stock?