IWDification - how to use on Mac OS X version?

Hi there,

I have the Mac OS X version of BGEE, which I got from the Beamdog website. I really want to use the IWDification pack to get more Druid spells from IWD.

How do I do it? It says to put the files in the BG game folder (presumably in the same place I put my portraits), but when I click the command file, it says "The file “setup-iwdification.command” could not be executed because you do not have appropriate access privileges."

I have tried to run it directly through console, but that doesn't work either. Anyone got some easy instructions for installing this? Really excited about improving the Druid class in BG!!!

Thanks