I'm trying to set up a masternode using this guide: https://darkcointalk.org/threads/how-to-set-up-ec2-t1-micro-ubuntu-for-masternode-part-1-3.240/

But, when setting up an instance in EC2, I can't find 'Ubuntu Server 12.04 LTS (PV)' as is shown in the image in the guide. Am I blind? I can find 14.04, and slightly different versions of 12.04 (without (PV) behind it IIRC). Which one should I choose? Is there a more up-to-date guide?

Sorry for the noob questions.