How to get a list with all available payment methods in Magento.
If for any reason you need to a get a list with all payment methods in Magento, you can do it easily by using the payment config class (app/code/core/Mage/Payment/Model/Config.php).
To get a list with all payments active and inactive:
$allAvailablePaymentMethods = Mage::getModel('payment/config')->getAllMethods();
To get a list with all active payment methods:
$allActivePaymentMethods = Mage::getModel('payment/config')->getActiveMethods();
To get a list with all credit cards that Magento supports:
$allCcTypes = Mage::getModel('payment/config')->getCcTypes();
I hope this helps you in your projects.