automated firefox installation script for windows

Hi, I need a Script for ultra dumb users that performs the following under XP as well as under any version of Vista: __with just ONE click__ 0./ As a user without administrator privileges 1./ download latest version of Firefox 2./ save such download in the deskop, 3./ run the install exe file and make the install happen under the user's My Documents folder 4./ Changes Firefox default splash screen to other Please note, no clicks from the user after he/she launched the installation script. Happy bidding, Thank you,