Magento: add a payment fee when using PayPal Express [closed]

Question

In Magento 1.6.0 I want to add a 2% payment fee when the customer selects PayPal Express payment. Unfortunately, Magento's PayPal module doesn't provide an option for fees.

How can I achieve this?

Thanks in advance, aeno

Answer 1

This one is for free: http://www.magentocommerce.com/magento-connect/paypal-payment-fee-3194.html. Also works on other standard payment methods.