1) I have an Intel Core Duo processor chip. Is it possible to upgrade to the new Intel Core Duo 2 chip? If so, would this be necessary? What are the significant changes/upgrades in the new chip? 2)When going to my school's library, or any place that has free Wi-Fi internet, how can I better secure my MacBook from anyone getting into my files? (taking music files, etc etc.) 3) I am interested in getting an external hard drive. Which ones are the most recommended? I probably would want to get a drive with at least 120 GB. Are they hard to install? Do I keep it plugged into my macbook at all times or can I use it and then unplug it? When backing up files to the external hard drive, which is most likely what I'll use it for since the files on my macbook use a lot of space, how do I change the path to backup to the e.h.d? 4) iphoto and itunes: is it possible to save my iphoto library, and itunes library to my external h.d and then be able to open it up without problems when needed? or since I dont have an e.h.d now, can I save it to my flash drive and open it up without any problems? 5) How do I backup my photos and music? 6) ugh!: i've only had my macbook for 8 months, and already i'm seeing dark yellowish stains. will Apple Care definitely care of this? 7) Last question!! -- my MacBook is getting slow. I have only half the space left on my hard drive which is the standard 60 GB. What files/programs can I delete safely? Any other suggestions would be good too! I'm very sorry for all the questions! I thank you all a million times!