If you go here:
http://ultimateedition.info/Ultimate_Ed ... /#downloadand go to the bottom, you can download Ultimate 1.7 with both Gnome and KDE.
Then after you have installed, at the login screen pick sessions, and you can choose to run either
Gnome or KDE from there.
The checksum(MD5SUM) is there also, to verify your download before you burn the disc.
There is a bittorent there as well. After your download is finished you can keep your torrent open to help others.
I think you can also download the KDE desktop from Synaptic.
Hope this helps, pch