This function takes a trigger pulse on pin-15 (28-pin) or 
pin-42 (44-pin) MM2 and uses it to create an output pulse 
on a user-specified pin with a user-specified delay and of 
user-specified duration.

See this post on The Backshed forum:
http://www.thebackshed.com/forum/forum_posts.asp?TID=10572