The image already has ubuntu 14.04 desktop on it. Before you use it you need to edit the 'OneBash' file your nvOC flash drive will place onto a small windows partition. Once that config file has been changed to point towards your address and to change OC/etc settings you don't need to touch anything when it boots - any prompts for passwords will be filled in automatically by the script, so don't interrupt it. Mine goes from cold boot to mining in ~2.5 minutes.
Gotcha. Since I'm mining ZEC, but currently havent set up an address yet, i guess the obvious is to wait until I have a ZEC address before booting ?
I wouldn't wait, let it run on the default address so you can get things tuned until you're able to update your address.
also, if i want to change the onebash file later on, do I have to change it on windows ( my laptop) or can i do it directly in ubunto? Thanks again =)
You don't have to change it on windows. I would suggest starting that way and first making sure your hardware is good to go by letting it boot all the way and see if mining commences. Once you're good there then you can search back 1-2 pages looking for the posts regarding SSH and screen. Once OpenSSH is enabled you can make your changes using the Putty client from another PC on your LAN and remote control it and even make config changes without always having to reboot.