Slider: horizontal transition distance control

Is there any way to control the horizontal distance of the sliders? In the example below the slider travels the full width when clicking the next button, as it's supposed to. But, I would love to have it only slide over the distance of two images at a time.

So, when I click on the next button, it slides over to reveal one or two new images at a time as opposed to a full batch of new images. Basically, step by step as you click on the next button.

For example: set it to slide 25% of width instead of the full width.

Make sense?

Is this at all possible?

http://keinejad.com/keinejadwomenslookbook.html

Thank you for your time,

Joe