1. Download GNS3 Windows version.

2. Install GNS3, checking every box except "WinPCAP".

3. Paste following .dll files into .....\GNS3\bin\GNS3

   (1)wpcap.dll: extract from WinPcap.exe

   (2)packet.dll: extract from WinPcap.exe

   (3)wanpacket.dll: from here - http://www.softpicks.net/dll/wanpacket-dll-15577.html

                                  or here - http://www.dll-files.com/dllindex/dll-files.shtml?wanpacket

   * If WinPCAP has been installed, these files can be found in Windows\system32.

4. In preferences, highlight Dynamips and click "test" to make sure it works.