Thanks for purchasing your Mac compatible 1000Base-T PCI Ethernet Card

Disregard the CD that came with the card.  It is an installer for PC's.

Open your computer and locate an open PCI slot.  Remove the screw holding down the cover. The card will snap down in the slot squarely.  Replace the screw.

Install the appropriate driver for your OS version. It is okay to use the Tiger 10.4 version for Leopard 10.5 systems.

Once you reboot your computer, in X select System Preference/Network, it should automatically recognize that a new device is installed and you can then set it up.  In 9 select TCP/IP and choose the appropriate card slot. It should automatically recognize the new device and walk you through configuring it for your network.

Operator Headgap Systems, Inc.
http://headgapstore.com