We accept both PayPal and Payza. Paypal does not require an account to process payments and Payza will soon be able to process non-member payments. All major credits cards, bitcoin, and echecks are accpeted. Please review the PayPal/Payza website for specific information and restrictions.
It may be possible but we do not recommend it. All the scripts we carry use the PHP extension "mysqli" It can work with PHP 5.0.7 or newer but we have only tested the script in PHP 5.4+. Any version older than that is at your own risk.