Or create your own alternate keymap with the officially sanctioned Microsoft keyboard layout creator[0] (I used it to recreate the exact Apple French layout[1]). Advantages are you can easily reinstall it, it does not need external software, and you can switch layouts easily with the OS language bar.
[0] http://msdn.microsoft.com/en-us/goglobal/bb964665.aspx
[1] https://dl.dropbox.com/s/zwx8un3kp5f8q3k/Apple%20Keyboard%20...