I haven't been able to find a manual for Cultures 2 either.
However I do have one for 4. (8th Wonder of the World)
There seems to be virtually no difference mechanically between Cultures 2, 3 or 4. Aside from different campaigns.
I actual prefer Cultures 2 the most because it has more and better freeplay missions.
Looking through that manual there are very few things that don`t apply to the second game, such as Dragons.
I will upload the manual, but somebody please tell me if that`s considered illegal or something, since I`m not sure if the manual is part of the copyright, if it would be considered pirating or something. http://www.gamefront.com/files/22916164/Wonders_Manual.rar
It seems to have some decent information, though the game still has a decent sized learning curve.