将字段添加到列表表单 - Sharepoint

I'm looking to add a new field onto my NewForm.aspx, EditForm.aspx and DispForm.aspx pages in Sharepoint Designer 2007. I've managed to add a new textbox webpart and have edited the Common Textbox Tasks to make the Data Field my new field (Contacts..)I'm looking to add a new field onto my NewForm.