Finally after some hours of work I did it! Now you can spawn the legacy D-series and the reworked D-Series at the same time. I had to export all 0.14 common pickup materials, parts and jbeams into the pickup mod; also I had to change all materials names and folder name because it was in conflict with the game D-Series. I tested it and everything works I also converted the materials from .cs to Json! Enjoy it!
If you want some pre remaster H-series stuff i could send them to you because i have 0.13 on my old disk
If you plan on making a h series legacy version, will it be possible to maybe make it so it fixes older h series mods like this one?: https://www.beamng.com/resources/gavril-h-series-addon-by-ar162b-sergentfido.1249/