DiddyMan,
The LinkStation has an auto-sensing ethernet port, so you can use a normal straight-thru ethernet cable to connect them.
You should configure the PC like this:
Assuming your Linkstation is set to an IP of 192.168.11.10, and a subnet mask of 255.255.255.0, you set your PC to have an IP address of 192.168.11.9 or .11, and a subnet mask of 255.255.255.0. Don't worry about the Default Gateway when you set it up this way, its not important in this situation.