I currently have OS 3.2 on my iPad. I do not have access to my PC which has my iTunes account on it, and I am looking for the best way to update to the most current OS. Can anyone answer these questions...I would really appreciate it. I have too many apps, and no folders. 1. I know I can use another computer to update the OS, and my sister has a Macbook. Do I just open her iTunes, plug in my iPad and click on "update?" I don't want to sync to her Mac; I only want the new OS. 2. How can I pay for the update? Do I need to sign into MY iTunes account on her iTunes? How do I do this? 3. Since I am not syncing--or backing anything up on her iTunes--what happens if something goes wrong? Will I lose all my apps and need to download all 200 of them one by one? 4. Would it be better just to bring my iPad to an apple store and ask them to update it? I know I am asking a lot of questions, but I would be forever grateful if someone could answer them....thanks.