I've been using my powerbook g4 12" 1.5ghz (late 2005 revision) for the past three years now as my main computer and now I am planning on demoting it to my portable to take to class (law school). Does anybody have any tips on what I can do to refurbish/refresh/clean it up to make it usable and new-like again? It already has max ram, but I figure I could give it a good cleaning and perhaps even upgrade the hard drive? What kind of hard drive does it have in it now? Would it benefit from a 5400 rpm or even a 7200 rpm? I should definitely replace the ****** worn-out battery too. Any suggestions for brand/type? What else could I do to make it run a little smoother? Also, is there a place I could send it to get cleaned thoroughly or at least a guide I could look at to do it myself? Any general tips for me? Thanks in advance!