The installation CD is no longer available. Instead, you can use either the SlingPlayer software version for Windows or the web-based application. If you want to use the SlingPlayer software version, you can check the following link in order to install this application.
If you want to use the web-based application, you can go to www.slingbox.com, log in to your Sling Account and check the "Watch" tab at the top of the page. Then, follow the on-screen instructions.