newest waldorf upgrade, which one?

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http://crunchbanglinux.org – I have been running older Waldorf and  I see distrowatch has announced newest version 8/6/12 is now available.I want to d/l 64bit for my Samsung N150 netbook (only 2MB of RAM). I have several questions.1.  if I use terminal "sudo apt-get dist-upgrade" will it install the latest version?2.  which version do I need?, ...i686, or ...amd64?3.  can I install using unetbootin? (did not work on earlier waldorf since I was using USB memory card, instead CD).thanks,gychang (HowTos)