Mirroring Cluster Weights?

[aaronseymour]

I have created a number of weighted clusters on one side of a characters face and now I want to recreate them for the opposite side. Is there a way to mirror the weights assigned to each cluster to a new cluster?

(and no, as far as I can tell it's not possible with the Mirror Skin Weights option?)

Thanks...

[failure]

Export the weight map, mirror it in image editing app and import back. This assumes that you have good uv's on your model.