Hi @Anonymous,
to install the MCG Samples can be copied in :
C:\Users\<users>\Autodesk\3ds Max 2018\Max Creation Graph\download\
C:\Users\<users>\Autodesk\3ds Max 2019\Max Creation Graph\download\
if the download folder does not exists, you can create it and put all the .maxtool and .maxcompound files there.
Is that what you are looking for ?
Regards,