Colorado photoreal scenery fsx

I am stonewalled trying to install CO Photoreal scenery on my PC..   I have downloaded it, extracted it, saved all the .bgl scenery files into a single CO Photoreal folder.  I moved the fplder into the scenery/add on scenery folder in the FSX file listing on the C: drive.  But I cannot seem to get it loaded and working when I try to "add area" in my FSX scenery library screen.   What am I doing wrong?

Thanks!