Even if the chipset supports vt-d, it needs to be accessible in the bios. For example, asus, intel, gigabyte z68/p67 cannot use vt-d but asrock and msi z68/p67 can. Asus did have support on a couple bios but then took it off, I'm guessing they want you to buy their server/ws chipsets. I guess this is the big headache; looking for a mobo that supports it. You could just make things simple and go with the intel q67 I suggested or go with a server/workstation chipset; c202, c204, c206. Or you could try going with asrock. I just found this but you need to make sure they mention vt-d as some only mention vt-x. http://www.vm-help.com/forum/viewforum.php?f=27
BTW you didn't have to make another thread.