Scrip conditions


In the ticketing system we have the status resolved, and a notification with condition on resolve notify requestor.
But it exists also a status rejected, but if I reject a ticket… yea … well … there isn’t a condition on reject in the scrips.

Here my question, can this condition be added in RT Core, I know I could use a custom condition (I saw something in wiki), or how do I jut add it to the drop down list?