How to install dual boot Ubuntu 13.04 nightly with Windows 8 and use Secure Boot?

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http://askubuntu.com – I have Asus G46vw notebook pre-installed with Windows 8 and Secure Boot. I want to dual boot W8 with Ubuntu 13.04 (nighty releases) and use Secure Boot. In order to actually have the BIOS recognise the USB drives to boot from ( Have to USB boot ) I have no choice but to disable Secure Boot and enable CSM in the BIOS. Then I can boot from the USB/SDcard. There are several places I could install a bootloader onto - There are lots of Microsoft related partitions on the disc! Also, if I install Ubuntu with Secure Boot disabled, and I actiavet it again, will Ubuntu (and Windows 8 ) work? The (HowTos)