Need to delete a content type but get the error "content in use" well you need to find where it is in use ... try this http://blog.tylerholmes.com/2008/02/deleting-content-types-in-sharepoint.html
CAML query builder so useful http://www.u2u.info/SharePoint/U2U%20Community%20Tools/Forms/AllItems.aspx developed by Patrick Tisseghem
