The automatic plugin installer should work for most people however if you would prefer to do a manual install it's quick and easy:
- Upload 'slideshowpro-sc.php' to the '/wp-content/plugins/' directory
- Activate the plugin through the 'Plugins' menu in WordPress
- Go to Settings > SlideShowPro SC to configure your setup
- In the visual editor click the new SlideShowPro SC button to generate your shortcode
- Add your SSP album number to the shortcode parameter albumID=""
- Publish your post