Hello Algae502002!
Our Dorico expression maps for SYNCHRON-ized Solo Strings work with the senza sordino and with the con sordino libraries. We have decided to make the expression maps for the basic presets, because the full presets include many articulations that are not easy to trigger with notation software.
You write that you "don't understand how to call them up in a project". If you use the playback templates we have prepared, the presets and expression maps get loaded automatically. More help on how to use our libraries with Dorico can be found here:
https://www.vsl.info/en/tutorials/guides/dorico-integration/introduction
Best regards,
Andi
Vienna Symphonic Library