Which PayPal API system should be used for processing? <br /><u>Choices:</u><br /><font color=green>For choice #1, you need to supply <strong>API Settings</strong> above.</font><br /><strong>1. PayPal</strong> = Express Checkout with a regular PayPal account<br />or<br /><font color=green>for choices 2 &amp; 3 you need to supply <strong>PAYFLOW settings</strong>, below (and a Payflow account)</font><br /><strong>2. Payflow-UK</strong> = Website Payments Pro UK Payflow Edition<br /><strong>3. Payflow-US</strong> = Payflow Pro Gateway only<!--<br /><strong>4. PayflowUS+EC</strong> = Payflow Pro with Express Checkout-->