xubuntu static NIC help

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http://www.linuxquestions.org – I have a project with a small device which is running xubuntu. Running DHCP all works fine, but we are sending this out to a client who gave us some specific IP settings. There is nothing GUI wise, which is nothing tragic, so I updated the interfaces file with the static info as well as the /etc/resolv.conf file and rebooted. The static info worked but had no DNS, and all that was in that file was; #SETUP by Network Manager (or something close as I am not at the office). You can run via cli NetworkManager but does nothing. I installed I think it was called KNetworkManager which is a GUI to the app, but when started it shows the eth0 device as in use so I am assuming something else is managing. So basically how can I get the DNS settings to stay either cli or gui.. Tnx (HowTos)