how can I change the button caption at the PayPal website? I read that the caption is depending on the url (https://developer.paypal.com/docs/classic/express-checkout/integration-guide/ECCustomizing/), but I dont know how I can change this required parameter.
This way works for me:
copying PayPal config data from core/mage/paypal/model/config.php to local/mage/paypal/model/config.php
and commented out line 624: //$params['useraction'] = 'commit';
after clearing the cache, the button caption at the PayPal website is "continue"