They asked if they recorded two lighting Columns could DigiTerra work out the distance between them and add it to the Record
without doing it in measure and adding it later?
Rather than wait for the next release for DigiTerra Explorer 5 which could be 1-2 weeks aways I would recommend you use the beta version of the software. Download it from here and replace the files "/SD Card/Bin/DTexp.exe" and "/SD Card/Bin/English.lng" with the version attached to this post (unrared of course).
This new beta version of the software which, should use for this problem with a new default value: "Distance to last object".
Look at this tutorial to see how it works:
Certainly you can use this bew default value with GSP survey also!