I loved the speed improvements Snow Leopard gave to my computer, but I knew that I would have to do a clean install sooner or later. Now, Safari and Firefox are crashing frequently (multiple times a day!) and everything is slowing down again. I'm hoping a reinstall of the operating system will fix that. However, I used up all 5 installs on my Family Pack. Can I reinstall Snow Leopard with that disc, even though all 5 installs have been used? Do I need to buy another copy? Can the Genius Bar do the clean reinstall for me while my computer is there for other repairs?