No. Don't install that Apple iDVD 7.1.2 update. For simplicity, you would be better off getting the Cracked font from the link that Tom provided you earlier.
Pacifist is a third-party application that allows one to look inside installers, extract internal content, and even install from the installer. It would be too difficult to explain how to use it to extract that Cracked font out of the Apple iDVD 7.1.2 updater.
By default, Apple did not install the Cracked font in OS X 10.6.8, 10.7.5, or 10.8.5, and it is reasonable to assume it was not installed in subsequent releases of the operating system.