playSMS - introduction and tips to customise your own gateway

replicate the gateway directory
/var/www/html/playsms/plugin/gateway

But you also need to change the /var/www/html/playsms/plugin/gateway//config.php and fn.php, try to search for "your name" within this directory to see what others need to be changed. 

You will not be able to access the /playSMS if you only introduced new directory within making the above modifications. 

However, once the above is done, you can access the /playSMS but still I don't see the new your gateway under the "Manage Gateway" menu... so.. need to explore further...