I think somewhere in this thread it was mentioned that this feature is not possible to implement to work only in Fences. It may require some some work on the part of the developers, but I think it would be possible. I use another product from another company that is similar in some respects that uses docks which you can drag your programs to, much like Fences and these programs can run with a single click, so therefore I think it would be possible to implement. I'm not a programmer and it may not be easy to implement in Fences, but I do think it would be possible and a nice feature.