Here is a pictorial guide to installing Message Keys for Outlook. (The actual dialogs may vary depending on which browser that you are using.)

Step 1 - Download the installer by clicking on this button.

Step 2 - Select Run

Step 3 - Take a break while the setup program downloads.

Step 4 - Run the installer

Step 5 -Click Next > to continue

Step 6 -Select the "I accept..." radio button, and then select Next >

Step 7 - If any prerequisites are required - like the Visual C++ Runtime Libraries, then you will be presented with a prerequisites dialog, otherwise please skip to step 10.  In any case, there is nothing to do here - just click Next > to continue.

Step 8 -Select run to install any prerequisite.

Step 9 - Please wait while the prerequisites install...

Step 10 -Click Next > to run the Message Keys for Outlook Setup Wizard

Step 11 -Please confirm the folder for installation and then click Next >

Step 12 - Please click the "Install" button to continue the installation

Step 13 - Please wait a couple of seconds while the setup wizard complets the installation.

Step 14 -Please select the "Finish" button to exit the wizard.

The installation is now completed. You can now load Microsoft Outlook, where upon loading for the first time, you will be presented with a inital configuration dialog.  A pictorial guide to using this dialog is avalible here.