1. if you mean the whole setup so you can install win8 on another computer... NO
2. When you use the upgrade assistant - at end - it gives you option to upgrade immediately (via internet) or download the ISO... I think you probably only get this option once you paid for the upgrade through the assistant. Once you have the ISO.. you can ofc burn it to DVD and install on another comp. Just make sure you make a note of the Windows key hat you will get as part of th eprocess.
After you get a valid key you can download from here as many times as you can endure. http://windows.microsoft.com/en-GB/windows-8/upgrade-pr.... The download lets you install, burn to disk or make USB install image or you can just select install later and It will make a link to download on your desktop.