Hi libkerry,

Yes, it will rest of the 5M. But this mode only work with Silverlight upload mode, it means your browser must has the silverlight plug-in installed and set the silverlight to  primary upload mode.

<CuteWebUI:UploadAttachments runat="server" ID="Uploader1" UploadType="Silverlight">

        </CuteWebUI:UploadAttachments>

Regards,

Ken