To connect the remote computer you would require two TPL-302E Powerline Ethernet Bridges.
One TPL-302E Powerline Ethernet Bridge connects to a LAN port on the back of your Cable/DSL Internet Router (e.g. TW100-S4WICA) with a standard CAT-5 Ethernet cable. Next plug the TPL-302E into a power outlet.
The other TPL-302E connects to the remote computer's NIC (Network Interface Card) with a standard CAT-5 Ethernet cable. Next plug the TPL-302E into a power outlet.
Lastly, to secure your Powerline network use the included software utility to assign a network password.