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I don't use Macromedia's Dreamweaver, but I do use Macromedia's Homesite 5.5, which has extensive language functionality for the editor, configured under Options>Settings>Editor. Since Macromedia also makes Dreamweaver, I'm sure there is a similar configuration available. You may find some help in our WYSIWYG Editors Forum [webmasterworld.com] where a lot of Dreaweaver conversations take place.
Also, surprisingly, the Netscape Composer that comes with Netscape 7 Communicator does a decent job with many character sets. It does however, play it a bit loose withthe html itself.