You would have to check to see if that viewer supports that sort of thing. There is nothing in the current object models that Adobe Acrobat/Reader support that controls something like that.
I think the problem is that its not a very good player, with limited functionality...so all it does is have a LoadPDF function that calls a pdf from a location and plays it through the player, but it doesn't allow you any additional customisation. So im relying on embedding some code in acrobat pro and then into the PDF so that when played through IQMercury player it picks up the embedded code.
Thats the plan anyway...whether it works is another thing altogether....i just can't move outside of using IQMercury as the player...it has to be played in that.