[KDE/Mac] How to install ?

[mi demur]

I have a Imac G5 MacOS X 10.4.
I have downloaded Torrent files at http://techbase.kde.org/index.php? 
title=Projects/KDE_on_Mac_OS_X#Introduction

name of this files are
qt-20071027.dmg
kdelibs-20071116.dmg.torrent
kdepimlibs-20071116.dmg.torrent
blitz-20071116.dmg.torrent
kdesupport-20071115.dmg.torrent
koffice-20071117.dmg.torrent
strigi-20071116.dmg.torrent
soprano-20071116.dmg.torrent

when I click on this file, it don't know the application for opening.

How to install ?
Thanks,