assuming you installed max in the default directory copy the included mi files to
C:\Program Files\Autodesk\3ds Max 2010\mentalray\shaders_autoload\include
now go to
C:\Program Files\Autodesk\3ds Max 2010\mentalray\shaders_standard
open the Standard.mi file with notepad
put a (#) in front of
mi "adsk_Mtl_Ceramic.mi"
mi "adsk_Mtl_Concrete.mi"
mi "adsk_Mtl_Glazing.mi"
mi "adsk_Mtl_Hardwood.mi"
mi "adsk_Mtl_MasonryCMU.mi"
mi "adsk_Mtl_Metal.mi"
mi "adsk_Mtl_MetallicPaint.mi"
mi "adsk_Mtl_Mirror.mi"
mi "adsk_Mtl_PlasticVinyl.mi"
mi "adsk_Mtl_SimpleGeneric.mi"
mi "adsk_Mtl_SolidGlass.mi"
mi "adsk_Mtl_Stone.mi"
mi "adsk_Mtl_WallPaint.mi"
mi "adsk_Mtl_Water.mi"
so they become
#mi "adsk_Mtl_Ceramic.mi"
#mi "adsk_Mtl_Concrete.mi"
#mi "adsk_Mtl_Glazing.mi"
#mi "adsk_Mtl_Hardwood.mi"
#mi "adsk_Mtl_MasonryCMU.mi"
#mi "adsk_Mtl_Metal.mi"
#mi "adsk_Mtl_MetallicPaint.mi"
#mi "adsk_Mtl_Mirror.mi"
#mi "adsk_Mtl_PlasticVinyl.mi"
#mi "adsk_Mtl_SimpleGeneric.mi"
#mi "adsk_Mtl_SolidGlass.mi"
#mi "adsk_Mtl_Stone.mi"
#mi "adsk_Mtl_WallPaint.mi"
#mi "adsk_Mtl_Water.mi"
save the file start max
you have to do that or the shaders won't load and you'll get an error at startup
if you decide to uninstall , remove the # sign and remove the mi files
