Take a look at: How to set up letterhead or some other document where you
want one header on the first page and a different header on other pages.
<URL: http://www.addbalance.com/word/headersfooters.htm> This gives
step-by-step instructions.

You may want to download the letterhead system from:
<URL: http://www.addbalance.com/word/download.htm>

This may not be the best way to set up letterhead, but it is a way that
works for me. It consists of modular components so that changes to a
letterhead are reflected in all form documents created from then on while
documents that were created earlier remain unchanged.

Also take a look at:
Letterhead Textboxes and Styles tutorial <url:
http://addbalance.com/word/download/index.htm#LetterheadTextboxesAndStylesTutorial>

Template Basics
<URL: http://www.addbalance.com/usersguide/templates.htm>

How to Create a Template - Part 2 - essential reading <URL:
http://www.mvps.org/word/FAQs/Customization/CreateATemplatePart2.htm>

Word "Forms"
<URL: http://www.addbalance.com/word/wordwebresources.htm#Forms> and

Word for Word Perfect Users
<URL: http://www.addbalance.com/word/wordperfect.htm> if you are coming
from a WP environment (or even if you are not).

Letterhead Tips and Instructions
<URL: http://home.zebra.net/~sbarnhill/Letterhead.htm>

Putting the letterhead in the header is sufficient to protect it from
inadvertent change; see http://home.zebra.net/~sbarnhill/Letterhead.htm. If
you want to protect it from deliberate tampering, then you can create a
protected form, but this type of protection is easily defeated.

--
Suzanne S. Barnhill
Microsoft MVP (Word)