You have to change it in your Normal.dot. Find where Normal.dot is stored on
your computer. Open it, make whatever changes, font style, margins etc.
Press Save. Next time you go into Word you should see your changes. A quick
way to find your Normal.dot is to click on TOOLS, OPTIONS, FILE LOCATIONS,
see where it says USER TEMPLATE? That's your Normal.dot. See where it says
it's located. Probably in C:\documents and settings\username\application
data\microsoft\templates.
Hope this helps.