If you want to install to uefi hardware, you need to use the uefi installer, which is not included in any packages I've released. For refracta8, I included the deb packages for grub-efi-amd64 and grub-efi-amd64-bin, and when you install those packages with dpkg, grub will create a boot loader and take over the boot.
Here's a more detailed explanation of how I arranged it in refracta8:
refractasnapshot-with-uefi-support-t576-20.html?sid=6731a2f0d96492a22669eeff5beeba7d#p6365If you have another linux installed on this system, you can get away without installing a bootloader by adding the new install to the boot menu in the existing installation. But if this is a first install, you need to make a bootloader. You could boot from the usb, chroot into the new install, and install the grub-efi packages. There are a couple of steps in between, like mounting the efi partition and bind-mounting a few things.
If you're any good with grub command line, you could boot from the usb, get to grub prompt, and get the new install up and running. Mount the efi partition and then install the grub-efi packages using your favorite package manager. Or you could run 'grub-install' (with no device) if the grub-efi packages are already installed in the system. Do not run 'grub-install /dev/sda' if grub-pc is installed. You may get bad results.
Here's the uefi installer -
http://distro.ibiblio.org/refracta/file ... aller-uefiHere's the readme that goes with it. The manual steps are in there, links to a tutorial on uefi installation are in there. Please read that stuff. I'll link it here to make it easy.
http://www.rodsbooks.com/efi-bootloaders/index.htmlhttp://distro.ibiblio.org/refracta/file ... all.readmeLook it over and feel free to come back with questions before you try it.