I have the Snow Leopard install disc but it never worked so I had to take it into the Apple store and they formatted it for me. I just recently bought 8GB of Crucial RAM (a bit overkill I know but $10 more for 4 more gigs, why not) http://www.newegg.com/Product/Product.aspx?Item=N82E16820148276 Planning on buying a WD Scorpio Black 500GB 7200rpm. Capacity isn't That much of a concern for me right now, I just want a boost in performance and speed as I still have the stock 160GB 5400rpm HD installed. (My mac is just used for my music, projects, and schoolwork). http://www.newegg.com/Product/Product.aspx?Item=N82E16822136692 Now once these parts are installed (or before), how should I go about installing Lion on the new HD? I'm going to personally backup my important files and just trash the rest. Also, I do not use Time Machine so no worries on that. Also, with the age and specs of my slightly oldie but goodie MacBook Pro, is Lion the best way to go or should I stick with my Snow Leopard? Thanks in advance for the reading and even more thanks for replying.