1.
as for the timeframe: 1015-1204
in other words beginning at the death of Prince Vladimir,
ending at the downfall of Kiev/crusaders capture Constantinopole.

2.
as for the units try to talk to the lead developer VIR.
(i'm just a passer by and not part of their team so i dont know the details).

wish you best luck and hope to see your mod finished.


P.S. ill say again if you will have communication problems(language related)
ill gladly help