How to instal Windows MUI packs

[zeroboo]

I have the english version of windows xp and various language packs on a cd.

How exactly do i install these things?
I have found this:

http://www.microsoft.com/globaldev/reference/win2k/setup/unattended2.mspx

but i seriously do not have a clue what it is on about!
I want to be able to change my user interface to another language at the click of a button

thanks in advance!