Only discovered the mod a couple of days ago (In frustration because my exports from Ricky have bugs that cause CTDs in about 1938). Installation went OK once I found the installation aide on the web.
When trying it in DD I found that the mod had "taken over" alll the existing scenarios. (Thus the 1936 scenario had the historical map and OOBs and gov'ts with only teh new graphics).
But when I "chated" and pasted the Kaiserrreich 1936.eug file in the save files it worked as it should. And it is a really fascinating gaming experience.