you can remove the required validation from the server validations server behavior.
in the server behaviors panel, double click the server validations server behavior, select the required validation for the file field and click the minus button.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.