Hi Brad,
I did this very thing and the only thing I noticed is that in your server behaviours window in Dreamweaver SA1 behaviours will have that little red exclamation mark next to them - if you double click them the new SA2 rule manager box appears, just click OK and they will disappear.
SA 2 uses a different helper include file than SA1 so remember to upload related files on your first FTP transfer after installing SA2.
Hope this helps you out.