Using the free accelerators, the case form is a custom asp.net web form that is implemented in createcase.aspx and editcase.aspx. It is NOT driven by CRM metadata. If you would like to put a new field on the form, you can simply put an asp.net
form control on the existing form and update the code-behind to ensure that the new field is included in the case entity before the call to create or update the case. The commercial version of the portals (from Adxstudio) has a much more enhanced CrmEntityFormView
control and can drive the portal UI based on custom forms in CRM, meaning that you can simply configure the web form in CRM and hit the publish button and the portal will render a new UI.
Shan McArthur www.shanmcarthur.net Check out the commercial edition of xRM portals @ www.adxstudio.com