Any one familiar with the PT_WF_NOTIFICATION App Package. Question on Content-Type

I noticed under Application Package EOAW_CORE.NotificationManager.OnExecute Method Notify there is a note that states: /* This property should be on each template to avoid sending all with one content-type */ Then the following line is commented out. /*&Notification.ContentType = "Content-type: text/html; charset=UTF-8";*/. How do you set the content_type to a different type for each template. I reviewed the Generic Templates where most of the email parts are located and there is not a place for content type. Does anyone know how to do this. I was able to comment out the second line listed and the AWE process using these