Are there any must haves? I have used Candy Bar (which finally is now free) I have installed growl and menumeter. For Candybar I have changed my icons but not all of them. Are there any ways I can change them and are there any that I can never change? Are there any growl apps for hardware montioring and itunes functionality that can be run on a PPC? Are there any that you recommend for someone who is both a noob but has had experience with the mac over the years from the old days of CDs being but into caddys and then into the drive and of Macs in almost every school room playing the early educational games.