Hi, my friend has a 2009 macbook pro and her hard drive is failing so I got her a SSD drive. I backed up all her files onto the "time machine". Her hardrive failed after and I was able to successfully move everything onto the external hard drive. I installed her new SSD and had her original installation disk. How do I now put osx snow leopard onto her new SSD? She already purchased it once before but now I don't know how to get it back without her buying it again?... What do I do? How do I do this???