change dns settings

[mouse_runner]

i have got wireless internet , controlled by eth1.
i want to set/change dns settings, according to https://store.opendns.com/setup/computer/

pls accept my appologies, but i have no idea how to do that.
i can open network configuration, but i am afraid to mess it up

thanks

---------- Post added at 06:26 PM CST ---------- Previous post was at 06:10 PM CST ----------

i have found it by myself:

https://store.opendns.com/setup/operatingsystem/ubuntu

right click on wireless network connection , and everythin looks like in the how-to.
i am using opendns now