I just started using the trial version of Enscape with Archicad. I'm doing interiors with a focus on light design but quickly found out Enscape has a lot of limitations when it comes to lighting.
Apparently Enscape is only mapped to Archicad's controls of switching the light on/off, light intensity and light color. So changing the light shape or illumination angle in archicad won't do much (if anything) in Enscape.
Would you post a simple example - a .3dm input from archicad, and the same file modified manually to the final point you want to go. The I can help you figure out the required steps to get from A to B.
Also what is your preferred programming language ?