So, hardware/mechanically I'm okay and shouldn't be too bad as I'm just following the iFixit guide: http://www.ifixit.com/Guide/Repair/...-A1226-and-A1260-Hard-Drive-Replacement/670/1 It's an early 2008 MBP. My question is concerning data. I currently have a 250GB 5400 RPM installed. I have a 400 GB WD hard drive that I have 350 GB set aside for time machine currently and 50 in FAT-32 for inter-computer storage and transfer. My new HD is a Hitachi 320GB 7200 RPM. I have Matlab 2007a installed as well as Adobe CS4. Is it worth it to install fresh OSX. If not, how would I mirror over the data, would I use Time Machine. If I do install fresh, can I get my data (music, movies, pictures) through time machine, or do I need to find another way to transfer the data? Also, if you have any hints or tips that would be helpful, let me know. Thanks everyone, just wanted some input as I had a hard time finding it in search (I must be retarded).