Glad you got the scenery add-on procedure sorted, Tuna!
A slight problem sometimes, is that the scenery "Mesh" may be a little different in FSX to that in FS 2004, so that there may be a slight problem with the elevation of some ground objects!
Unless it is very serious, I tend to ignore it, because the FS 2004 scenery is so nice!...

...!
..and if it does cause a big problem, I just "un-tick it" in the Add-on Library list...and find something else that works...

...!
Paul..."....another fine Mesh you have got us into, Stanley!"....

Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.