Already using it :-) I can confirm about compatibility with this mod (KSP 23.5) (game loading): * MehJeb * Deadly Reentry * KWRocketry * ActiveTextureManagment [aggressive] * TAC LifeSupport * KSP Instellar I've found that installation instruction is wrong. Step 3 should be Copy content of "Cerrak's planet system" folder in archive to GameData\PlanetFactory\PluginData\PlanetFactory. Not "Neta folder", which isn't present in archive. Actually I was able to load game only after clear entire content of GameData\PlanetFactory\PluginData\PlanetFactory before installing Cerrak's planet system AND on load screen disabled to load default PlanetFactory planets. I'm using OSX with 16GB of RAM, but KSP still 32 bit.