talking login screen in Maverick

[Milton]

Hi,
Months ago I installed with success Maverick with speech enabled and I got a talking login screen.
For a friend who already installed Maverick without speech he also wants a talking screen. Is it possible to do so? Can you give me advice or instructions how to do that? He has Orca 3.1.3-xdesktop running.
I went into System > Preferences > Accessibility but could not figure out how to let the login screen talks.
Thanks in advance.
Milton
can he 
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