Three questions involving a potential HD upgrade: 1. To select which HD is compatible, i need to know the "model" of my MBP. I bought it new in August 2008 and have attached the info (I've upgraded to 4GB RAM). Do I have the Penryn? 2. What is the maximum size available? The biggest I can find (I think) is 500GB (at OWC). Is this correct? 3. I am backed up with time machine and I have my leopard install disk that came with the MBP. Will my applications be backed up on time machine or will I need to reinstall those too? Because that could get messy (I've bought several programs downloaded from their corporate site). I'm fairly new to the Mac and am overwhelmed with info out there. Thanks!