Greg, I've found the Editor to be really handy. I like to add things to my VSD sites (slideshows, scrolling divs...). With no previous coding experience, it wasn't difficult to figure out how to do what I wanted to with it. And, it's easy to preview what you're doing, so you know it works and looks the way you want before you add it to VSD.
As to VSD, it's (usually) pretty easy to add scripts and code snippets to it. Seems a lot of things come in 3 sections:
Some code for the header (Edit > edit Header – copy/paste the code here)
Your files (Edit > Add Files – lets you browse to your file, click to add)
Code for the actual page/body (use the HTML tool to drag out a box on the page, then paste code in it)
Then there'll be some adjusting to get the positioning just right, but that's a quick overview for you
I'd jump on the Editor deal

It will allow you to do so much more with VSD... and if you ever want to code something from scratch (no VSD), it's a great tool to have