Hello! So, I'm sure this will sound quite strange to most of you, but here is my question: I got several iTunes cards for my birthday, and I used up most of my store credit. I have 10 dollars remaining right now, and I was planning on saving that for a rainy day sometime - in case some new album comes out that I really want or something. However, my sister is selling me her old iPod touch, and I am going to buy the update for it so I can install apps and such. I would like to buy the update with my credit card but still keep my account credited with the 10 dollars - is this possible? (Is there some place where I can change my payment method?) Thanks!