I made a bootable AMD64 GhostBSD 4.0 USB key, and was able to boot my laptop (Dell Latitude E6330, UEFI) with it. I used the graphical installer, and got several errors along the lines of "Cannot mount volume. Error org.freedesktop.Hal.Device.UnknownError", but it seems to install fine. Upon reboot though, I can't boot, and the UEFI loader can't find the FreeBSD partition (there's an entry for Ubuntu, which was the previous OS on this laptop). Any ideas?