SMS for one support department via Clickatel

Can anyone offer simple advice for enabling a working SMS notification to admin mobile for one support department (emergencies).

I know that I can set up email to SMS - unfortunately my mobile provider doesn't support that feature, but I do have a clickatell account - just need some current advice on how to set that up in submitticket.php

There are some very old threads on the matter - hoping someone has a recent example;
http://forum.whmcs.com/showthread.ph...ation-to-WHMCS

Thanks in advance.