EhEhEh! Have you tried [] exec "myscriptwithoutext"...
It works also! You don't realy need to add your scripts an extension!
But, sorry, I think this won't answer your Q.
You could try yourself, and check out for differences between calling a SQS or a SQF...!
About SQF: I'm very new to those kind of functions, but, for what I know, SQF have a specific calling method. Check the Command Refference and you might get an answer!