All of the advice is excellent, and I don't have anything new to add.

However, I just wanted to add one more voice to the 4 pages is long for a resume. Karen is absolutely correct in that it needs to be succinct. I have had to read through resumes before and anything over 2 pages is just a bit to long to wade through. Take Karen up on her offer to proof read it. It is true that you want to have no errors or very few errors in it.

I am sure you'll do fine. Good Luck!!