Today I setup Orcas for using CUDA sucessful.   
Have compiled some samples, all sucessful.
1. Sample using CUBLAS
-----------------------------------------------------------------------
------ Rebuild All started: Project: simpleCUBLAS, Configuration: Debug Win32 ------
Deleting intermediate and output files for project 'simpleCUBLAS', configuration 'Debug|Win32'
Compiling...
simpleCUBLAS.c
Linking...
Embedding manifest...
Performing Post-Build Event...
Build log was saved at "file://c:\Programme\NVIDIA Corporation\NVIDIA CUDA SDK\projects\simpleCUBLAS\Debug\BuildLog.htm"
simpleCUBLAS - 0 error(s), 0 warning(s)
========== Rebuild All: 1 succeeded, 0 failed, 0 skipped ==========
---------------------------------------------------------------------------------------------------------------
2. Sample using CUFFT
----- Rebuild All started: Project: simpleCUFFT, Configuration: Debug Win32 ------
Deleting intermediate and output files for project 'simpleCUFFT', configuration 'Debug|Win32'
Performing Custom Build Step
tmpxft_00000a8c_00000000-11.i
Linking...
Embedding manifest...
Performing Post-Build Event...
Build log was saved at "file://c:\Programme\NVIDIA Corporation\NVIDIA CUDA SDK\projects\simpleCUFFT\Debug\BuildLog.htm"
simpleCUFFT - 0 error(s), 0 warning(s)
========== Rebuild All: 1 succeeded, 0 failed, 0 skipped ==========
---------------------------------------------------------------------------------------------------------------
It shows that my system is working now.   
heinz ~seti_britta

Hi all,
if my new V8-server is ready, we can start here again.
The server is equipt with a Sapphire HD3870. Choosed this card because it has 320 streaming processors.
So no CUDA is possible at the moment, but AMD has equivalent developer sofware too.
thanks Devaster and Raistmer I could download all necessary packages already. 

heinz