Just to add:
Sorry sadsid, I am finding it difficult to interpret your answer.
I wanted to know how to free up these sliders so's they can be used.
I also posted a query in the "Missions" section of this Forum. Saltydog has replied and it is his opinon that they could possibly be left-overs from sometime past?
As they are pretty much vital to my Mission creation I wondered if there was some way to free them up?
Or are they there to simply tempt and frustrate..in the nicest way possible of course
Thanks