1)error message: "d3dx9_30.dll was not found" was when I attempted to run the "warehouse" and the "venice" downloads. I am running direct x 10, shouldnt they be backward compatible?

2)I want to test the new GED but I want to open "To change that please open the wmb of one of the techdemos." But I cannot find where to download a tech demo which has a .wmb.

It does not seem very friendly for a new person to attempt to understand the GED when there is not the techdemo available which is pictured in the manual.