Installing a Second PCI Ethernet Device

Bought a PCI Ethernet device to install into my PC so that I can use it as a Proxy/NAT server. The model that I bought is a TP-LINK 10/100M PCI Network Adapter (TF-3239DL). I opened up my box and installed it into the white PCI slots in the mainboard. I fired up the system and checked ifconfig but don't see the new ethernet adapter there. 

Went back to the networking page of www.aboutdebian.com, as I had trouble getting the new PCI ethernet card to work. Using lspci | grep -i ethernet shows that linux has detected the new PCI card. I had to install a program modconf to help install a new device driver (modules in linux). After installing the modules, network configuration settings needed to be entered in the /etc/network/interfaces file.

after this is done & rebooting the system, ifconfig will show the new PCI card.