Like timo_w2s said, in the receiver menu the should be something like utils - Upload NDF.
A .ndf or .cndf will be written to your USB stick.
Then insert the USB stick in your PC and open that .ndf or .cndf with Clarke Tech Editor Studio (CTES).
You can modify or add satellites and transponders to your liking.
In CTES, West is entered in the 360° East system, so for example 90.0° West is entered as 270.0° East.
Save the .ndf again (under another name to avoid confusion).
Insert USB stick into receiver, select Download menu, and select that ndf.
(I must have done this a thousand times on the Dr.HD F16 !)