Powerpoint add-in

I don't know of one, but you can build hyperlinks, by using the hyperlink button on PowerPoint's toolbar (looks like chain links). Be sure to give the full location of the file by right-clicking on the file you want the hyperlink to point to and selecting 'Properties' and then copy and paste the 'Target' dialogue (all of it, which is fully selected by default when you open the properties of the file) by using 'Ctrl C' and then in the PowerPoint hyperlink dialogue box use 'Ctrl V' If you run into more problems or need further instructions, please let us know.