There's no such thing as "requires", and your "conflicts" in KWRocketryRedux-InstantPwr.netkan and KWRocketryRedux-GraduatedPwr.netkan should be to "KWPowerResponse", same as the "provides". You can put a "depends" pointing back to KWRocketryRedux, but testing is going to be tricky. Using "file-> install from .ckan" should do the trick, but you may need to do individual .ckan files multiple times, bracketing the dependency. So install KWRocketryRedux-InstantPwr and KWRocketryRedux-GraduatedPwr ckans first (they will fail due to lack of dependency, but the details will be added to your registry. Then install KWRocketryRedux, and it should prompt you to pick one of the PowerResponse mods. ( I believe)