org-mode upgrade and PDF export

[adam <ahcnz@orcon.net.nz>]

The system here is; Ubuntu 12.04LTS, Emacs 23.3.1, 
Org-mode version 6.33x 

1) 
Emacs with Org was recently installed via the Ubuntu Software Centre. 
If the Org version here is 6.33x, and Org is now version 8, then I feel
I should upgrade Org. 

The Org Manual http://orgmode.org/manual/Installation.html lists 3 
ways to install a new version, but no suggestions how to remove the 
older version. I can't find an Org 6.3 package in Synaptic to remove.
That section warns against have two different versions present.  

So, I guess it would be best for me to use the first method, 
"Downloading Org as an archive", and to simply include its load-path 
in my .emacs. 


2) 
In attempting to publish a sub-section to a PDF, I find I need a 
pdflatex component and a texi2dvi script. 
This is referred to Section 8 here;   
http://orgmode.org/worg/org-tutorials/org-latex-export.html 

I cannot find pdflatex or texi2dvi in Synaptic, so should I look 
via apt-get, or are they part of a larger package available to me?