Creating Dreamweaver extensions

Hi

Has anyone out there got any simple-to-follow steps for creating Dreamweaver extensions.

I’ve got a bit of HTML and JavaScript that I want to be able to plug into pages and adjust slightly based upon user input.

I’ve got the Macromedia pdf that accompanies the product, but don’t know which of the 692 pages to turn to first!!!

I’m sure if someone’s got an example I can hack it about until I get to grips with it. I just need a starting point

HELP!!

Cheers

John :-\