Sorry...that part is written for Panther and not Tiger. This is how you can do it:
Open any finder window.
Type "Microsoft Word" in the spotlight bar (upper right)
When it finishes, if you find more than one copy, click on one of them.
At the bottom, it will tell you the path.
The correct copy should be in /applications/microsoft office 2004/
If there is another folder containing copies of Office, trash that whole Office folder