I want to take the already extracted contents and launch that in some way from command line.

No you don't :) trust me you don't

... Its like blackmagic ...

Not really, its actually very well documented ... Re: pp with gui

but thats irrelevant, you do not want to do this, believe me

If you don't like how pp works, try http://www.cavapackager.com/appdocs/overview-quickstart.htm