I made a few modification to the EP with attributes so that it could have a multilingual admin and it have an option to easy the work for thouse who don't use product_model.
It is at:
It was quite simple but I wasn't very familiar with the way to make a contribution so I send it like a new contribution rather than a modification to an older one. And I'm afraid that there is an error with the version number. :(
Just to avoid some of the posible confusions.