Here's the simplest example
<html> <head> <script src="http://maps.google.com/maps?file=api&v=1&key=yourgmapskey"></script> <script src="http://bluweb.com/chouser/gmapez/gmapez.js"></script> </head> <body> <div class="GMapEZ" style="width: 300px; height: 300px;"></div> </body> </html>
See more examples here
http://bluweb.com/us/chouser/gmapez/docs.html