You don't need the regular editor, starforge is totally independant.
You need to download and install the required files to run it:
Common ControlsVisual Basic RuntimeI think you should start with SCXE (from your map making skill, because I know a lot of questions will pop up after you use this editor - however if SCXE isn't your type of ir doesn't work for some reason then stick to this)
Beacons into the ground? - I'm assuming it is a cloaked beacon.
Disable the beacon at its location.
Place a observer over it.
Wait for 500 ms.
Remove Observer.
You're done
The doodads from different worlds are actually sprites, they are a specific layer like the terrain or unit layer. They can be easily found in the starforge editor. It is just that SCXE and regular Staredit doesn't have the option because it doesn't support it.