Facebook Likebox Slider is a flexible plugin with Facebook faces, stream and header. Very easy to install and configure with nice design.
Login to WordPress admin panel, go to 'Plugins', next click 'Add New', choose 'Upload', click 'Browse' and find a arscode-social-slider-free.zip and next click 'Upload Now'
If plugin is installed, go to 'Settings' choose 'Social Slider' and now you can configure the plugin.
For more help go to plugin homepage.