If you would like to use ETS (Electronic Transaction Systems Corporation) as your payment gateway/processor, please contact them at https://www.etsms.com
Once you have created your ETS account:
1) Login to your COOLSite Admin and click on Configuration > Payment Processor > Real Time.
2) Select the radio button next to "ETS".
3) Click the "Activate" checkbox
4) Enter your CID and Password.
5) Click Submit.