Table of Contents - Sort order

Hey all,
for my company internal web site I make extensive use of the web component
"Table of Contents". It shows documents by categories and the sort order is
by document name. The site was made with FrontPage 2003 and runs on IIS 4.
Now my question:
The displayed documents are sorted by name in direction A to Z. How can I
change the sort order of this ToC web bot to show the documents Z to A?
Any idea will be appreciated!