Hi everyone, great site. I just have a quick question--can I buy these discs: http://cgi.ebay.com/ws/eBayISAPI.dl...sPageName=ADME:X:AAQ:US:1123#ebayphotohosting to upgrade my tiger macbook to leopard? or do I have to buy the full installation one? i figure, I have tiger, so these install discs will work, right? thanks!