Click the download link for the definition you want to download. You'll see a dialog box like the one below, with options to Run or Save - your dialog may look a bit different, but the options will be similar.
Choose the Save option and save the keyboard definition somewhere - I've created a Keyboards folder to store it in.
Run the setup program for the keyboard definition from the folder that you downloaded it.
Wait while the install completes, which could be 30 seconds or so.
If the install completed successfully, you'll see a message like the one below and you can click the Close button to finish.
If you're using Windows 2000 everything will be in a slightly different place, but you should be able to find your way through.
Now that the keyboard definition is installed, you need to configure Windows to use the new keyboard layout.
Open the Control Panel and choose Date, Time, Language and Regional Options from the list.
From the list of tasks, choose Add other languages.
You'll see the Regional and Language Options window, like the one below.
Click the Details button.
This'll take you to the Text Services and Input Languages window, which will probably look like the one shown below.
If you have a look at this, it's telling you that the Windows is configured to use the English (New Zealand) language, and the standard US keyboard layout.
We want to add a keyboard layout, so click the Add button.
To add the new keyboard layout, you need to specify the Input Language and the Keyboard Layout to use.
Choose the new keyboard layout from the list as shown below, and click the OK button.
Now that you've added the new keyboard layout, it should show up under the English (New Zealand) language.
You've now got a choice. You can either remove the US keyboard layout and just use the Māori keyboard layout (you won't lose anything by doing this), or you can keep the US layout and switch between using the Language Bar at the bottom of the screen.
If you're not sure, I'd recommend removing the US keyboard layout. If you do decide to keep it though, make sure you make the Māori keyboard layout the Default Input Language by choosing it from the list at the top of the dialog.
Confirm all the changes and click OK.
You'll probably have to log out and back in for the changes to take effect so read the sections below or print this page so you won't lose your place.
Make sure you're using the Māori keyboard layout - if you've removed the other keyboard layouts and restarted you'll be fine, otherwise make sure the Māori keyboard layout is selected in the language bar.
Open up an application that can handle Unicode characters - the built in Notepad or Wordpad applications can do this, as well as word processors like Microsoft Word.
Try typing in some macron characters using the method for the keyboard layout you chose - probably by typing the vowel while holding down the right [Alt] key.
If all's gone well you should be seeing macron characters. If not, check the FAQ and Troubleshooting section for help.
You'll need to go through the config steps above and remove the keyboard layout that you want to uninstall
Once you've done this, log out and back in again to ensure that Windows isn't using the keyboard definition anymore.
When the keyboard layout is no longer being used, run the keyboard definition setup programme again.
This will give you the option to Remove or Repair the keyboard definition - choose Remove and click the Finish button to complete the uninstall.
After a little while, you'll see a message telling you that the removal has been completed. Click the Close button to finish up.