Third World War v3

Hi,

I am trying to add extensions to the Third World War v3 Module, but am getting an error message with each of three extensions.

Any ideas what I am doing wrong?

I figured it out…and for any other future noobs:

I created a separate Vassal Mods folder in My Documents - put mod in here.
I created a separate Vassal Extension folder in My Documents - put ext in here.
Worked like clockwork after that.

This was my error message (abridged):
java.io.IOException: Could not create C:\Program Files\VASSAL-3.3.2\GDW_Third_World_War_V3_ext…