How to add a mcg script via maxscript..

Tip from the maxscript and mcg facebook group

pathToMcgFile = @"c:\\temp\\filepath.tool"

Viper3dsmax = dotNetClass "Viper3dsMaxBridge.Main"
Viper3dsmax.InstallMcgPackage pathToMcgFile true

/*
"true" is for seeing log in the Listener.
Look in startup folder and ProceduralContent.ms file. 
For more tips
*/