NVidia-Drivers / libcuda.so?

Hi, I want to use the NVidia drivers together with libcuda.so to use my graphics card for calculations (for SETI@Home to be more exact). After I installed the related graphics-driver-packages from RPMFusion I found some programs like nvidia-cuda-proxy or nvidia-cuda-server-control but no libcuda.so. Amazingly these NVidia-CUDA-daemons are not started. Google told me libcuda was part of the NVidia xorg-drv-package at least for earlier versions than Fedora 18. So what happened to it? Is there a reason why it is no longer part of that package? Thanks!