I'm looking for a way to default the Billing Information on the PayPal site when using PayPal WPS to process my payments in Drupal Commerce (v7). Currently, I have the Billing Information defaulted correctly on my Drupal site from the user profile so the customers do not have to enter it again during checkout (already entered when they registered), but do not want them to have to fill their Billing Information on the PayPal site once redirected during payment processing.
I have done this before when creating my own "home-grown" solution using the simple Pay Now button at PayPal by setting input form fields on the page that submits the form to PayPal.
<input name="first_name" type="hidden" value="frank" />
It would be a far better experience for users that do not have PayPal accounts to have this information defaulted on the "Pay with a debit or credit card" section of the PayPal page.
Thanks for any help! Frank