[SS4] Get custom linestyles from DGNLIB to RSC for editing/copying?

I am working on some pavement markings, and we plan to use custom linestyles for most of the different striping patterns. Unfortunately, the linestyles we have are stored in a DGNLIB. I would like to create an RSC of some (not all) of those linestyles so that I may use them, as well as create my own to go with them. I have no idea how to get a custom linestyle copied out of a DGNLIB.

What steps do I need to take do extract the linestyles I need to an RSC? I can't find directions for that - my serach skills are not working for me today.
Thank you.

MaryB
MSTN v08.11.09.829