Do you have the OptimizePress Plus Pack? If so, then you can use the awesome new Plus Pack Slider element, but if you would like to have a full width slider, all you have to do is set a custom CSS class just like in the image below. To do that, just go into “row options” and scroll down to “Row CSS Class” and enter something. For the CSS code below, that would be “fullwidthslider”
Then scroll down to “Row CSS Class”
Once you do that, head over to “Page Settings > Other Scripts > Custom CSS” and drop this code in and you should now have a full width Plus Pack Slider on your page.