I found two great articles about using Dreamweaver with Subversion.
Part 1 is an introduction to subversion, an some general concepts about code versioning
and
Part2 is about confuring DreamWeaver to work with Subversion. An important aspect here is the directions on how to setup the file comparison tool. This is very important because in Subversion it is normal to have conflicts, but working without a nice file comparison tool can be a nightmare.
A couple of good comparison tools: SmartSVN (I really like this one but is commercial, but try it, it is very good) and Meld (you can download a version for windows from https://code.google.com/p/meld-installer/)