As per guide, you must use the USB to boot your installation until you have a chance to install Clover to the main system drive.
You should not expect that your BIOS can boot OS X without Clover.
Sorry, I was not clear in my post. I did use the USB to boot. It did not boot to Clover. I got the message with USB. Since I posted I have determined that somehow I corrupted the USB. There was not a 200 mb fat32 partition. I created a bootable clover USB with Bootdisk Utility (I'm on Windows machine now), changed the config.plist, and I was able to get into Yosemite on hard drive. Configuring now with multibeast. Thanks!
Sorry, I was not clear in my post. I did use the USB to boot. It did not boot to Clover. I got the message with USB.
As per guide, you must press F9 during BIOS POST and choose boot CLOVERX64.efi via "Boot from EFI file".
The guide does not use Multibeast.
I did use F9. That was not an option. USB was option but when I chose it I got the DD BIOS error. The USB was corrupted. When I made new Clover boot USB it worked.
It will be a better result than traditional methods too (it uses hotpatch).