installing windows on mac installer disc could not be found

Here’s my solution to the “Installer disc could not be found” problem when installing Windows on a Macbook Pro Retina with Bootcamp using Bootcamp Assistant. I have also tried one other Windows 7 CD (The Restore CD from my laptop), and a legit Windows XP CD to no avail.Update Feb 6, 2013: See Lior’s comment/ fix to Bootcamp Assistant not giving the option to make your USB drive into a Windows installation bootable drive. I did however get it to locate the 'Installer disc' by mounting the ISO to a virtual drive, but then upon reboot, I just get the error message 'NO BOOT DEVICE'. NOTHING will recognize as a Windows installer disc (says boot camp).

I have also tried using a USB Drive, formatted every which way I have read.

Doing it another way I have found online, and holding down alt/option on boot only brings up my main Mac HD, and a recovery partition. Every time I try to use boot camp I just get the error 'The installer disc could not be found'. I have burned it at least 6 different times, with different burning utilities (Including Toast 11 Ultimate) to no avail. I downloaded the Windows 7 ISO from Microsofts website (I have a product key already).

I'm trying to install Windows 7 on my iMac. I have tried absolutely everything I can find online to remedy this, and I just can't get anything to work properly.

Installing windows on mac installer disc could not be found