The AspDotNetStoreFront is already integrated with PayJunction. Simply login to your AspDotNetStoreFront Admin and select PayJunction as the Payment Gateway, then provide your PayJunction QuickLink Login and Password.
QuickLink API Login and Password
To see how to set your QuickLink API login and password, click this link:
Please contact AspDotNetStoreFront support if you need further assistance: http://www.aspdotnetstorefront.com/t-support.aspx