Tim,
....... All i can see is flat terrain.......
To get more realistic (terrain) topography you need to install enhanced 'terrain mesh' scenery files.
In most areas the FS2004 default terrain mesh has a resolution (distance between elevation data points) of several hundred meters or more. With the 'smoothing' that takes place between these points, there is very little character in the topography (smooth flats and rounded hills, mountains.)
Enhanced 'terrain mesh' add-ons fix this by increasing the resolution. The common resolutions are; 76m, 38m and 19m, (also referred to as LOD9, LOD10 and LOD11 respectively) with 19m providing the most detail but having the largest file size(s).
'Terrain mesh' is available as freeware or payware. Try Google-ing 'FS2004 terrain mesh'.
Simviation Downloads hosts the
FS2004/FS2002/FS2000 70m Global Terrain Mesh for The Whole World.You can also look thru the Simviation-FS2004-Scenery library. (Search the downloads for (Holger) 'Sandmann'.)
Dave