Hi, i have a 2.2ghz aluminium macbook and i was wondering if video editing using adobe premier pro will work with it ? Would it be necessary to upgrade my ram from 2gb to 4 gb ? I also understood that i would be needing a faster HD ? but unfortunately my macbook doesnt have a firewire port so will external hard drives with usb 2.0 be fast enough ? if not , should i replace my internal HD to a 7200rpm HD ? thanks