ITaP's directions are here:

For Windows XP and 2000:
https://help.itap.purdue.edu/viewarticle.php?articleid=367&searchid=&refid=2

A search also turned up this article (may be for newer machines?)https://help.itap.purdue.edu/viewarticle.php?articleid=1544&searchid=&refid=2