Who would have thought Microsoft could make a decent video software. This is well worth a look http://www.microsoft.com/download/en/details.aspx?id=18974
The trick is to hit "Alt F9" when you are focused on the table of contents. This will produce something like: { TOC \o "1-3" \h } Change the 3 to a 4 and you're done. Exit the TOC field by hitting Alt F9 again and rebuild the TOC, you're done