In reference to your second question: Here is a link to some great documentation, with pics, created by Raptor on removing the radio bezel and surrounding panels. I'd be almost certain you will have to remove those to gain access.
How-To: Change your cluster color on 97-03
In reference to your first question, I'm not really sure. There is a member named "Jbrew" who has some really great diagrams. He may come along and share them out, or you can look through his pic gallery and see if he has anything in there helpful to you. Good luck with it.