What's the best way to create a letterhead template with "header" information
shown vertically along the left side of the paper?  

Also, can you make the page 2 margins different automatically without
carrying forward the page 1 margins (I don't want headers on page 2 of the
document)?

This document will be used hundreds of times a week, so I would like to
avoid any constant re-formatting, cutting/pasting or extra steps.

Any help would be appreciated.