title: Using activemerchant with PayPal Payments Advanced
body: <p>I have a hosted web site built on Rails 2.3.14 and Ruby 1.8.7.  In order to capture shipping info so I can compute shipping charge, I provide the form for shipping address and then use a credit card processor just to handle the actual credit card entry and authorization.  PayPal's Payments Advanced does exactly what I want.  I'd really like to use the activemerchant gem but I cannot find information on which specific gateway to use or how.  There is an active_merchant discussion on github that says "This is almost an carbon copy of Payflow Link", but I cannot manage to convert that to a useful example, since every example I find passes CC info.  Can anyone point to or provide an example of this usage of activemerchant?</p>
  
  <p>-Russ</p>