|See if this works:|
Select New document,
Select File Open
Navigate to where the normal.dot file is located,
Not sure about Vista but on XP it is usually:
C:\Documents and Settings\<your user name>\Application Data\Microsoft\Templates
Also, on XP, the normal.dot is a hidden system file so may not show.
If you can't find it:
Go into My Computer
Click on the Tools menu
Choose Folder Options.
Click on the View Tab
put a check where it says "Show hidden files and folders"
and UNCHECK "Hide extensions for known file types"
and "Hide protected operating system files".
Make your changes
Save the normal.dot,
Now when you open Word again, the changes you made should be part of the normal template.
The old normal template should be renamed and saved in the same location as a backup.