I agree, but i don't think, that there is such a model (in public).
If the ezCrew does not want to publish it (do they ? ;) ), we might get going with some tool. I saw something, that can create graphic models from SQl. With that, we "only" need to find our the key relationships between tables.... but of course, we'd miss the explanations.
I agree. I just use so much time everytime I need to find out relations between the tables to understand and develope functionality and code..so it would be very useful.