Design Compiler and Xilinx-Libs - Possible ?

Hi All

I found a document on the Xilinx-Website that explained how to do that (Xilinx Synopsys Interface) Unfortunatly I can't find the required files in my installation of the Xilinx-Webedition (synopsys/libraries/dw/src) Are those files only provided with the full ISE ?

Greetings

Andi