As of a few moments ago, the KA2 Manual Addon I promised has been uploaded to ModDb. Just awaiting approval.
What is in this manual addon I hear you say. Well, I don't want to give too much away, else what'd be the point in you reading it? However I can say that it's purpose is to add the Hydrans to the manual for both your technical examination (Either to know what your allies can do, or to "know thine enemy") and for me to tell you the story of the Hydran people and their realm.
I hope you get as much enjoyment out of reading it as I did writing it.