Tech ARP just posted the Vanderpool Technology BIOS feature today. This brings the BIOS Optimization Guide to more than 390 BIOS features.
"Vanderpool Technology is used to enable or disable the Intel Virtualization Technology (IVT) extension, which is also known by the development code name of Vanderpool. It allow multiple operating systems to run simultaneously on the same system. It does this by creating virtual machines, each running its own x86 operating system..."