Single Operation on multiple 3dsmax materials

I everyone,
I've inherited a scene in which all materials have a VrayColor map on the diffuse channel.

I need to unchecked or clear the VrayColor map from the diffuse channel for hundreds fo materials, and to do it manually it's quite tedious.

Is there a script or a tool inside 3dsmax9 (64bit) that allows me to make a single operation (in my case to uncheck the map of the Diffuse Channel) for a lot of materials once?

Thank you very much for any help.