Hello,
Our cart doesn't get involved in the actual business of shipping, we just report buyer information to you and apply any shipping costs you designate to an order, so there's no features within our cart to facilitate something like this.
However you can still do it manually or with a third party service, and you can have the order information automatically sent to whatever system you use via our third party integration feature:
http://www.e-junkie.com/ej/help.integration.htm
