The perl web framework Mason seems to play well with Dreamweaver, at least some people manage to get it to play well.

"The Problem

If you use the syntax of Mason in Dreamweaver most of the code isn't properly displayed, mainly as simple text. Which is totally uncool for <%INIT> or similar blocks. In a standard DW installation only <% some code %> is displayed as an ASP icon. Specially when you work with graphic designers which are used to WYSIWYG this will help a lot, as HTML looks more like HTML :-) "

The solution... is described at Mason and Dreamweaver

Hope this helps!