Installing language pack (MUI) on remote desktop services windows server 2008

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http://serverfault.com – I'm experimenting with the remote desktop services role (terminal server) on server 2008 and I'm not entirely sure if the installation of a language pack should be done in "install mode". Is it a "best practice" to use "install mode" for ALL installations once the RDS role is active or should I be selective depending on what is installed, e.g. language pack? (HowTos)