I also get the installation failed, even if a try to only install Clover from HVT. In fact, I can't get Clover to work in my HD even using Clover Installer and I can only boot from HD using Clover from the installation usb drive.
Another problem I have is the missing /Extra folder and the empty /EFI/Clover/ACPI/origin/ folder. Maybe the solution is simple, but I'm just new to OS X and hackintosh and I don't know what to do.
P.S. I'll post my /var/log/install.log file ASAP