My grandson is visiting from "far away" and he brought his iPad 2 with him. I have an iPad 3. I want to jailbreak his iPad2 for him but want to back it up first. When I connect it to my computer, iTunes only allows me to "setup as a new ipad" or restore from one of MY backups. Is "setting up as a new iPad" adding his iPad to my system or is it erasing all his data and starting from scratch? It seems like it should be possible to have multiple iPads on one computer with different owners.