Hello There, I would like to put a bigger hard drive in my iMac Dalmation, slot loader. It has a 40 Gb one in it that it came with. I have seen several on ebay but a lot of the second hand ones say they are formatted for Windows. Does this matter? If I fit another drive and use my factory restore/install disk will this erase and reformat a used drive for me? Also mt iMac has a CD-RW drive and I would like a DVD one, is it possible to find ones that are suitable? Thanks 