Default Keyboard for new users in Windows 7

I just installed Windows 7 and I want all users signing in to the computer to see the Language Bar customized with the following three languages:

"English (American)"
"French (Standard)"
"Chinese (Simplified PRC)"

I am running the following four commands at log on in order to change the registry such that each user will see the language bar, and then have access to the three keyboard layouts mentioned above.

reg add "HKCU\Software\Microsoft\CTF\LangBar" /v ShowStatus /t REG_DWORD /d 4 /f
reg add "HKCU\Keyboard Layout\Preload" /v 1 /d 00000409
reg add "HKCU\Keyboard Layout\Preload" /v 2 /d 0000040c
reg add "HKCU\Keyboard Layout\Preload" /v 3 /d 00000804

The above works fine, but with one small/major inconvenience: the user has to log off and then log back on in order for these changes to take effect and see the language bar, as described above.

The question becomes:

How can I force these changes to take effect so that users don't have to log off and then log back in to see the language bar. This has to be done automatically when users log in.

p.s. Control Panel is locked down. Users cannot get to Region and Language.

Solution 1:

In the Control Panel search for Keyboard or Region and Language... (You don't have to set this directly in the registry...)

EDIT September 22, 2012

Here a solution using the command line:

Windows Vista Command Line Configuration of International Settings