restricted drivers not showing up when syslinux.cfg is used to boot livecd straight to desktop

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http://askubuntu.com – I have created a custom LiveCD of Ubuntu 12.04.3 32bit using UCK. I created a bootable USB using Startup Disk Creator and I am able to detect and install restricted drivers without a problem when selecting "Try Ubuntu" or Install from Ubiquity. However, after editing the syslinux.cfg file as show here, no restricted drivers are found. I am editing the syslinux.cfg so the LiveCD goes straight to the desktop without prompting the user. I am able to run "Restricted Drivers" in System Settings and the hardware shows up when I run: lspci | grep vga but no drivers are detected. (HowTos)