When I have a php header and footer included in my php document, the html in the header and footer displays in display view of dreamweaver (which along with the rest of my content) forms a complete page. When I try to do the same trick with .htm(l) documents, I just get a php symbol representing the code block, and dreamweaver doesn't actually substitute the header and footer html contents. (I'm doing this because my html files are interpretted as php files for search engine reasons)
Does anybody know how to tweak dreamweaver, so either it interprets .htm / .html files the same as php files, or there is a way to tell dreamweaver to expand php blocks in display view.