I had installed the kX project drivers, but they dont work with CF.
This thread has another solution with line-in from onboard sound, but i dont have onboard sound

So i searched for an alternative solution for using my audigy 2 zs with CF.
U only need the YouP-Pax drivers and the Audigy4.iso to patch your audigy 2zs to audigy 4. The advantages of audigy 4 is the better software, much settings and good tools.
On
this page u have the instruction. Simply follow there instructions. Nearly all links there are down, here are some alternative links:
The Audigy4 image, the patch and the newest YouP-Pax drivers you can find
here. The spkcal (Speaker Calibrator) is uploaded
here.
Im happy with his solution, the sound is very good and every speaker can be controlled.