Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.
If you want the genuine workshop manual version VE models, search for GM Techline ESI 2009...
I dont think you are going to find this manual as a free download on the web though. (Its around 8Gb in size), and covers nearly all GM vehicles from 2004 through to 2009.
(Holden, Chevrolet, Opel, Vauxhall, Buick, etc, etc)....
The free Pontiac G8 one that is floating around has been captured from the genuine version, and has around 30% of the VE Commodore content from the original version...
I was lucky, and I bought a legit version from eBay USA almost 2 years ago now for roughly $80.
The legit version cannot be copied (so please dont ask me to do this), however it is listed on eBay from time to time.. (Just dont search for Commodore Manual on eBay, as USA guys list them as Ponitac G8)...
Hope this helps