When a few of my friends have asked about rooting, I've explained it by comparing it to something they understand: Windows. That is, the main logon is the admin account where I can change anything I want; screensaver, desktop, system files, install/uninstall software, etc...but the guest account limits many of these permissions. Same with phones. By rooting, you gain admin access, but stock from your carrier, you're only a guest. Understanding that makes rooting a lot less scary. Of course, you also need to be able to follow directions TO THE LETTER.