Hi Craig,
I hope this will help you. I've been Dreamweaving quite a bit, so here's my attempt to help you.
In "windows" --> Open the "behaviors" window... all you have to look out for is "open browser window". Make sure your cell is selected. After that, define your pop up page (a separate html document) in the "url to display" and fill up all attributes accordingly.
If you are adventurous to explore dhtml scripts another option is to explore this site if u havent done so already: http://www.dynamicdrive.com/ . You will find some pretty interesting ideas here too.
------------------
1000s of targeted prospects to your site, every single day, absolutely FREE! Create your FREE TrafficSwarm account now!