Mae, as in the Kendô Renmei iai? What do you want, a verbal explanation or a video--you'll need to be more specific.
A good explanation with photos can be seen here: http://www.geocities.com/nobaradojo/Seitei.htm
Indianapolis Iaido Kyokai
Muso Shinden-ryu Iaido
[This message has been edited by A.J. Bryant (edited 03-01-2003).]