[Zope] dtml-sendmail, dtml-boundary

Greetings! We're using the dtml-sendmail tag to send attachments. The filename that gets sent is basically unknown until the file is about to get sent off. Actually sending the file isn't a problem, but having the correct filename appear in the received email is hanging us up. There's a "name" argument to the dtml-boundary tag, but it doesn't seem to be able to parse any variables. Is there some easy way to hack MIMETag.py to make the dtml-boundary tag actually parse the arguments as python? ie: <dtml-boundary type="'application/blahblah'" name="REQUEST['filename']"> We'd also use it to make sure that the correct MIME type gets sent. Thanks! -CJ