Bennykanoby

Need help with vista codec pack... Downloaded the pack but it does not seem to work... I dont have a clue as to what i'm suposed to do with it once installed! I keep reading you must uninstall all other codec or versions on system but does that mean the current media player and win media center????? Is it about the vista codec configuration?? Would appreciate some help on this matter...i feel like a total tit when it come to new programs!!! Thank's Ben