making a ufi bootable usb drive from iso:

- partition usb drive with a GPT partition table (using gparted, etc)
- create a partition and mark it as bootable
- format partition as fat32 fs
- mount the partition
- using an iso with efi boot loader, use 7zip to put files into the 
  mounted directory of the usb drive

$  7z x iso-file.iso -o/media/$USER/USBDRIVE

- umount and use