Can someone please help

I have dowloaded the Osmose patternship and the later of the 2 Farmland-grid (patternbox) scenery for the AFPD sim from RC-Sim. The first Farmland-grid scenery that I installed had a readme doc that shows how to install and that worked perfectly. The plane and the second scenery download files are application files and I think they suppose to run themselves? When I click on either of these dowloaded files a window pops up and says "Unable to locate Aerofly Professional Delux. Please reinstall the program from the CD." Why would this happen?

Cheers