The Lertap manual exists in electronic and printed forms. An electronic version of the manual accompanies each copy of Lertap when downloaded from www.assess.com. It's the Lertap5UserManual.pdf file.
Extra electronic copies are available at no cost: download the whole manual by visiting www.assess.com (if you click here you'll see a picture of the downloads area within www.assess.com as found in December, 2006).
Some of the individual chapters in the manual may be freely downloaded from Australia: read about it here.