A plugin that allows you to show the featured images of the available posts.
Once the plugin is installed you can see a link under Settings menu called "WP Horizontal Slider". Click on the link. It will show you another page where you can set the category for the image slider.
If you want to change the arrows in the slider please go to "/wp-content/plugins/wp-horizontal-slider/images". Just replace the arrow-left.jpg and arrow-right.jpg with your desired arrow images with same name.