Spfxsynths has released a free drum system for Kontakt, based on samples from the Elektron Machinedrum:
You need to be at Kontakt 4.2 for this to work.
Just been informed there is a dj called Doomcloud so will change the name of this when I make the next update of it.
Just download and unzip the file to wherever you want and it should work-Do not move any of the contents from the folder.
I made most of the samples using the drum synth of an Elektron machine drum.
Download link (Megaupload).