I was talking to my friend about your reply and he said this back to me.
You could refer him to this guide it covers the method I use for compressing models
http://chaosrealm.info/topic/7801082/1/ it doesn't cover how to do it to models that already have bones and animations tho, just tell him to take all the geosets out of the model that had it's doubles removed and copy them to a folder then import them into the old model that had the bones and animations then just reattach the bones to the vertices it will take at least a few hours but people would like his models more if they are a lot smaller.
Your models are very good and all but many are too large in size to justify using in maps on bnet :/ My friend compresses models down to like 35% of their normal size and the models still look very good but are much more size friendly ;)