For some of you this may mean nothing and you will know nothing about what I am talking about. For others, you will. Ok, I've decided to keep the other Petrucci that I have tuned to C at the moment. However, I want to tune it up to D G C F A D. So here is my question, What is the best way to do this when I put new strings on, I have a general idea and I have the book Dale Erlewine on how to set-up and repair guitars. But I wanted some opinions from some of you who are experienced at this as well. Any suggestions, tips??? I know, I know, I will have to adjust the intonation. Please feel free to provide your comments!