Browser Plugin: Delivery Confirmation / Direct Signature

Hi,

I'm trying to understand what I need to set in the XML to send Delivery Confirmation with Direct Signature to ShipRush (http://www.shiprush.com/product_docu..._Options.htm)?

I see the following ones but with little documentation as to what each one does? I'm also looking to do the same with UPS, so if you have insight there as well that'd be great. Thanks!

TPackage\DeliveryConfirmation
TClientSettings\DefaultSignatureConfirmation
TClientSettings\SignatureSurcharge
TPackage\RequireSignature
TShipment\FDXSignatureRequired
TShipment\FDXSignatureReleaseNumber