Quick update on the wyrmlings:
black / green / blue / red /white on the first row

brass / bronze / copper / silver / gold on the second row.
All have their blueprints matching the D&D data, including the pseudodragon and the faerie dragon (for which I took the NWN values though).
What still needs to be done is the creature weapons (luckily, NWN2 had the hide properties available, although for adult / very old / venerable dragons), and probably a young, an adult and a great wyrm version.
What started as a test for verification of the conversion of NWN creatures into multipart NWN2 creatures has now become a full project... But that's all the funnier as I needed a few dragons for my campaign anyway.