[Zope] standard_error_message - including object name

I've set up standard_error_message to e-mail me the error messages. I'm interested in how to get the name of the object that generated the error inserted in the e-mail. I tried putting <dtml-var REQUEST> inside of the <dtml-sendmail> it doesn't seem to insert anything... I'm interested in other ways to make the standard_error_message more useful as well. Sorry if I've missed something in my googling. Even a URL to a resource on this would be appreciated thx -- David