I'm looking at the EZSkin setup right now. There is a component node inside with these settings:

Component: 0
Color: White 255,255,255
Point: value

The Color part of this node is tied to the diffuse map (V4's body color map).

The question is what is happening here exactly? Is the node trying to extract all the red from the texture? I looked at the manual but still don't quite get it.