Open the install media for VS2010 and browse to ":\WCU\EFTools". Her you will find two files:
ADONETEntityFrameworkTools_enu.msi
ADONETEntityFrameworkTools_enu.cab
Copy those files to a folder on your PC.
Create a log file in the folder - for instance with the name "Log.txt"
Open a cmd prompt (possibly run the cmd prompt as administrator) and navigate to the folder with the msi and cap files.
Run this command: