automating language environment settings

[Crni Gorac]

>From time to time, I'm using emacs to edit documents written using ISO
8859-2 charset. Thus, I have first to set language environment to
"Latin-2", then to open text file and finally to select "latin-2-prefix"
as input method. So I was thinking about automating above process by
creating corresponding emacs mode and then to reference this mode from
first line of related documents; if everything setup properly, emacs
should be able to apply all necessary settings upon opening
document. However, while everything else works fine, emacs seems to be
unable to change language environment using above procedure. Any
suggestion here?

Thanks