Back in 2014, forum user @nadseh wrote a little  ModuleManager script to add MechJeb and Kerbal Engineer to any vessel with a command pod.  It hasn't worked for KER for a while, and he hasn't updated it, so I've adopted it and released an updated version.  The original thread is here: This now adds kOS to all, if you are using kOS Note that the KER functionality is also available with KER its
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