Render layer material override

# Attach last shader to selected ShaderGroups
from pymel.core import *
sl = selected()
ShaderGrps = sl[:-1]
NewShaderGrp = sl[-1]
for sg in ShaderGrps:
    RlOveride = editRenderLayerAdjustment(sg+".surfaceShader")
    RlOveridRSe = editRenderLayerAdjustment(sg+".rsSurfaceShader")
    NewShaderGrp.outColor >> sg.surfaceShader
    NewShaderGrp.outColor >> sg.rsSurfaceShader