[CentOS] Changing the charset in Centos 4.3

Hi, My Centos 4.3 Server was installed with the english language only.
The server hosts several files in spanish and the PHP code that themes
the webpages uses the charset  "iso-8859-1".

If I do an "export" in my system it shows: LANG="en_US.UTF-8"

Does apache or the operating system needs to have the charset changed?
Where?

Thanks,


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Erick Perez
Panama Sistemas
Integradores de Telefonia IP y Soluciones Para Centros de Datos
Panama, Republica de Panama
Cel Panama. +(507) 6694-4780
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