There may be one more way to work around this without having to detach the template from within Dreamweaver. You will need to open the page up in an external editor, like notepad. Find the following line toward the top of the page and temporarily remove it:
<!-- InstanceBegin template="/Templates/your template file.dwt" codeOutsideHTMLIsLocked="false" -->
Then save the page and open it in DW again and try to apply the progress bar. It should let you place code into any part of the page now. Please give this a try, you will need to add this template reference back into the page in the same place when you are done.