I made CKAN metadata files for this mod. Here is Github repo: https://github.com/A2K/KSP_InterstellarExtended_CKAN Installation instructions (advanced): Simply add the github URL to CKAN as metadata repository and look for "Interstellar Extended" in mod list Installation instructions (simplified): Click menu: Setting > CKAN Settings Click "New" under "Metadata repositories" Copy this into input line on the bottom on the window which just appeared:Interstellar Extended | https://github.com/A2K/KSP_InterstellarExtended_CKAN/archive/master.zipand click "OK" Close "Settings" window and click "Refresh" on the toolbar Now "Interstellar Extended" should be available to install in mod list, simply install it like any other mod. The mod installed in such way seems to work correctly (game does not crash and lots of new parts are available), but I am new to KSP and I don't know what exactly this mod is supposed to add to game, so some stuff could be missing. This method does not install that weird toolbar, extended filters, TechManager, and fuel switch mods. I don't know if those mods are required for Interstellar to work correctly.