The problem with the template code being written to the mail body is an issue we discovered late lat week. It will only occur when using Dreamweaver CS3, and using the DW Edit icon to create the message body. We are working on fixing the problem, and have a fix available as soon as possible.
If you select the option to use one of the built in mail templates and save that as a file, the offending code will not added, after the universal email behavior has been applied to the page, the template file will open for you to edit.
can you please clarify what you mean here so I can better understand the issue in order to offer a solution? perhaps if you could supply a screen shot, that will help me get a better idea of the issue.