Hello everyone I am new to this forum. I recently received and Adobe Creative Suite 5.5 Master Collection DVD for the Mac OS. This was given to me by a friend of the families who is a teacher. My question is she never left me any instructions about the DVDs and i was just wondering is it possible to find out if the serial number has already been used previously, and will this hinder my downloading the programs process. When I open the case there is three DVDs and there is also a yellow slip whic...