Full screen width module position in "T3 B3 Blank" Template for Image Slider

I want to create a module position that covers the full screen width so my image slider as no white borders - is this possible - and is responsive

I am using the "T3 B3 Blank" on my test site - http://www.clickandrent.mobi/en and I have been able to create a new module position but it is always a maximum of 12 columns wide with white space at the side - I don't mind altering a global width value to have no white space down the sides or preferrably just the module where I intend to put my slider has to be full screen width.

I am a newbie in the T3 / Joomla world does anyone have a step by step to create a "Full Width Slider" module position below the main menu - I am a seasoned php programmer and RHCE so know my way around systems - but am new to the webprogramming side.

I am looking to do the same as - http://crosstec.de/templatedemos11/ - I tried the crosstec template but it is absolute rubbish, the load times for pages are painfully slow.

Regards
Martyn