Copying/transferring weight maps

[Sergio Mucino]

Another "n00b" question... how do I go about copying a weight map between objects? I have two meshes that are exactly, the same, just under different models. I've painted a weight map on one that I'm using to modulate the effect of a deformer. Now I need the other mesh to deform identically. I though I'd be able to just copy/paste the weight map, but that seems to not work. Ctrl-dragging the weight map does copy the weight map node, but it does not bring with it the two sub-operators that are needed for it to work (a weightmapop, and weightpainter). I've tried to copy/paste and drag-n-drop these, but Soft won't have it. Any ideas? (I can't use the ICE approach because my target mesh has some ICE trees and operators at the modeling level already, so I wouldn't be able to freeze the ICE tree used to copy the map afterwards). Thanks for any help!