Got the answer to my question and wanted to share for those that still use CS4....
Now to answer your question about getting HTML5 functionality in Dreamweaver CS4:
Don Booth wrote an extension that adds HTML5 code hint functionality to Dreamweaver CS4 so you get code hints for HTML5 documents:
The HTML5 Pack for Dreamweaver CS3 and CS4:
Download and install that extension.
To add the HTML document type, however, you need to modify the file named MMDocumentTypeDeclarations.xml. Here’s how to do that:
1. Find the configuration folder then navigate to the documenttypes folder. The Configuration folder can be found under the folder where you installed Dreamweaver.
2. Find and make a backup copy of MMDocumentTypeDeclarations.xml (MMDocumentTypeDeclarations.xml.bak)
3. Open MMDocumentTypeDeclarations.xml in your favorite text editor. If anything goes wrong, you can always get back to the default state by replacing your changes with the backup copy.
4. Go to the end of the document and find the </documenttypedeclarations> tag and add the following lines just before the </documenttypedeclarations> tag:
5. Save the document
6. Restart Dreamweaver
You should now have an HTML5 document type option when you create a new document.
There was an issue with Dreamweaver CS4 that needed to be fixed in code to fully support HTML5 documents which is why upgrading to CS5 was recommended. In CS4, Dreamweaver’s definition of a well formed HTML document has a meta content type which isn’t required for HTML5 documents so, no matter what we do to CS4, any HTML document created by CS4 will have the following:
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
Replace that line with this:
You’ll need to do this every time you create a new HTML5 document.
Once you finish go to Preferences New Document and select HTML5 as default Doc Type...
What I did was create a snippit of the meta and added it to my snippit's meta folder