I'm planning to buy a Windows 8 Upgrade for my computer, and need to know if I have to keep my Windows 7 disks around and have to install Windows 7 first before doing the upgrade, or if there is somewhere that I can enter my Windows 7 key alongside the Windows 8 Upgrade key if I want to do a clean installation of Windows 8 from bootable media.
Can I get by with just writing both keys on the disk like I have in the past?