The System ID uniquely identifies a particular computer. On Fusion V4 this is the first 8 digits of the 12-digit Fusion serial number. This can be found by going to the "About Digital Fusion" box – it is the number below the build date. On Fu5 the System ID is the MAC address of the Ethernet adapter. To find this go to Start->Programs->Accessories->Command Prompt. In the window type: ipconfig/all

The Ethernet adapter physical address will be given in the form: xx:yy:zz:aa:bb:cc. If Raptors plug-ins are already installed you can also go to Start->Programs->SpeedSix->License ID to display the MAC address.