in my opinion, for the little that is worth, you are entitled to no money at all. she is/was the photographer and it was her vision. I know nothing about the legal means in a situation like this, but it just doesnt seem like you as the subject should get compensation.
The model release should have been done by the photographer before entering her images.
strange to think about though, if I take a photo of a landscape and it wins some money or the like do I ethically or morally need to give a portion of that money to the subject some how?