I have many questions but few clear answers. What would be the benefits of doing a clean install vs. an upgrade? I have an iMac 8,1 which supposedly is eligible for a 64 bit kernel. Would I have to do a clean install or an "archive and install" to get the 64bit kernel? Also, can someone explain to me exactly what an "archive and install" is/does? From the name, I'd assume it would back up your HDD to an external storage unit, then do a clean install, but I'm probably way wrong. One more question. If I so happen to choose to do a clean install, would Time Machine be an adequate way to restore all my data after the update? Any help or answers to any of the above questions would truly make my day. You will also be rewarded $1,000,000,000 in Happy FunTime money.