Regarding CTD errors.
As Adam wrote, errors will be prevented if you create a new "Space_X_rockets" folder with the same files that exist in "Space-X_launchers" folder.
( You may also change all links to "Space_X_rockets" folder near "Module=" lines into link for "Space-X_launchers" folder)
I have created a new folder in /config called "Space_X_rockets" and copied everything from "Space-X_launchers" into it. But I still get CTDs with first stage jett on the 1e and 9 class. I have multistage2.dll package fully installed, too. I also get a CTD when separating the satellite from the second stage of the 9h.