Hi. I'm wondering in the near future if I wanted to upgrade a computer from Snow Leopard to a Lion (because the app store is annoyingly making all the good applications not compatible to Snow Leopard anymore), but I'm not sure I want Mountain Lion yet. The computer I want to try it on is very old (2008); so I'm not sure it can handle Mountain Lion. Is there a way to install Lion only? I can't find it in the app store. Also what will happen to all my apps and data if I upgrade? Will they still remain where they are?