I can't believe it. I purchased, downloaded and installed without single problem.  :D

How shall install CS 727/707 ? :-[

Update:
1-I drag 707 file to 3DFSX. When I opened 707 has no landing gear, controls doesn't work. I deleted file.

2- 3D influence to FSX and making many changes. All "Add-ons" drop menu disappeared, NO more Scenery 120-127 all gone.
I think, 3D running  FSX for its purposes  .

How shall install CS 727/707 ? :-[

Any advise?? :-?