Hahaha! I was going to ask you if I could use your CK1 Westeros mod as a base for my own CK2 mod. Glad to hear I won't have to! 
After I release this I will work on a new scenario set at the end of Feast of Crows, this will be a good period because pretty much every realm has been decimated and the are oppurtunities for kingdoms to be rebuilt (good from a gameplay perspective) and since history isnt predetermined (unlike events in Clash of Kings).
What should you click after you've clicked the dowbnload link? I've clicked on the Download/Play Now, but it simply seems to come up with a video.