Bobby, aparently it´s easy. Try to follow these steps.
1.- Locate the folder where all the landscapes are,
usually C://archivos de programa/Fms/Landscape
then find the file "fiel2dr" which is where the runway is locate.
2.- Open "field2r" in Paint program, make the lines you want, or even
As I did my self, you can Add a couple Ramps with "A" & "B" for extra
positions. After you finish to modificate, Save as= "field2r_1"
In tthay way the original is intact.
3.-Open the "World.sc" file whit a text editor, find the line
"QUADRANT 1 1 1 1 FIELD2r" & substitute as
"QUADRANT 1 1 1 1 FIELD2r_1" Then Save the file As
"World_1.scn"
Voila! You have A NEW WORLD SCENARY NAMED "World_1"
4.-Run your program starting with the original World.scn
then you can switch to World_1
I´m tryng some other changes to practice especifically with choppers
keep in touch