Rita,
This might be a bit too late, but the easiest way I have found is to use the
"Headings" for making a new chapter. Your friend is wise to make each
chapter a new file, but then what I do is to combine all of the individual
chapters together and make a book at the end of the process. Using a heading
of say 1 for the new chapter works well for me then when you go through and
make a Table of Contents it picks it right up and you don't have to worry
about making new pages each time you update your work, you just update the
Table of Contents and it does it autotmatically (at least in Word 2007).
The other great thing about using "headings" is that if you have sections in
your article or chapter, you can make them a different heading like 2, 3,4 or
5.
Again, perhaps late, but something to definitely think about.
Also, when you are done, put the document in Adobe's Acrobat Standard (or
one of the other products that Adobe has for the purpose) and you can put it
into a document that your person can read in Adobe Acrobat Reader so that the
reader can't change what you have written. The product works for Microsoft
Word 2007 and is very fast and efficient, plus people can't steal your work
if you make it secure.