Assuming you are trying to connect the second wifi nic to a wireless AP... set its ip to something in the 192.168.80.xxx range, and turn DHCP off.
edit /etc/network/interfaces with your favorite editor and insert
iface wlan0 inet static
then edit /etc/rc.local before exit 0 with the following, replacing "ESSID in quotes" with the essid... in quotes (this is for an AP without password)
ifconfig wlan0 down
dhclient -r wlan0
iwconfig wlan0 essid "ESSID_IN_QUOTES"
iwconfig wlan0 mode Managed
ifconfig wlan0 up
now turn that into an executable that runs on startup
sudo chmod +x /etc/rc.local
finally run it
sudo sh /etc/rc.local
Let me know if you have problems or are trying to do something else