I have used the following Switch menu:
Description: Switch Menu is a unique navigational script with characteristics of a folding tree. It dynamically expands the chosen menu item when clicked on while contracting the rest. This script is DOM based, so it works in IE5/NS6/Opera7+ while degrading well with older browsers such as IE4/NS4. For the later the menu will appear fully expanded from the start.

However my links are to PowerPoint presentations and my users want to be able to launch Powerpoint when clicking on the links rather than seeing a slide show. Is this possible?

Hi

Not really, they would need to download the file and then open in PP, as the web converts it into a viewable format, not intended to be editable etc by users. rgds,Simonf ;)