CS4 — Book using two or more files

I am using CS4 and need to set up a book (I know how to do that) that encompasses two or more files.  In File 1 I have a text block placed across a two page spread.  The last column will be a page number pointing to a specific page in File 2.

Question 1:  How do I get File 1 to link to the specific page in File 2?

Question 2:  Is there a way so that if the page in File 2 moves within the file, to have the reference in File 1 change?

Question 3:  Is there perhaps a tutorial for this?

Question 4:  Am I correct in that if this works I will be able to output a PDF with internal links in place?

Cordially,
A. Wayne Webb