Custom parameter in FormView?

Question

I have a Formview with its mode set to Insert, binded to an SqlDatasource, wich also has insert methods setup. The columns in the table are called 'title' 'message' 'date' 'ip', and is supposed to look like a blog or guestbook.. Now, In insert-mode the formwiew generates textboxes and binds them to the parameters, but, to the date- and ip-parameter, Id like to use DateTime.Now and Request.UserHostAdress properties, Whats the best way to do this? Should I diss the FormView and do everything codewise instead? Id like it if it were possible to immitade the way the textbox-values were binded, like; Thanks for any kicks in the right direction, this is a jungle to me