I simply compiled the DNA modeling command to be working in layout, no need to add nulls either.
Lightwave┤s DNA Modeling tool compiled as lscript to work directly in layout without using modeler, though it takes too long time for it to draw bonds with cylinder mode,( a couple of minutes) so you only see the dna with cylinder bonds already created, it seperates parts though, so you could add a bullet force which I did here and swirl it around.
last in the clip I show how it creates the DNA with the converted script only in line mode for faster creation

You folks..Let me know if it is worth posting up here? somewhere at 0:37 you can see me click the script, but only using the line bonds, it takes a bit too long as mentioned with cylinder bonds.