integrate pro sites + PayPal Website Payments Pro

i am using pro sites plugin from wpmu. I have recurring subscriptions and also trial is enabled so the PayPal process uses the subscription mode. According to what the PayPal settings mention the "PayPal account Optional" won't work because of that. As a result the customer,during paypal express checkout is forced to register to paypal. He/she cannot choose wether to just use his/her credit card or lgon to paypal account. In a few words: PayPal Express Checkout is the availabe PayPal payment option in Pro Sites, which doesn't support accepting payments without login to a PayPal account. In order to start accepting recurring payments from customers without a PayPal account, i need to use PayPal Website Payments Pro, which is not available in Pro Sites now. So i would need integraion between these two plugins.