It loads distributions by downloading ISO files (CD image) for you, or by using an ISO file already downloaded by you.
Select an ISO file or distribution to download, choose a target drive (USB key or hard drive), and restart when finished. If your USB drive is not recognized, reformat it to FAT32 format.
If you are using the "USB stick" installation mode : after rebooting, boot from the USB stick. On PCs, it is usually sufficient to press the Esc or F12 key immediately after rebooting the computer, while on Mac you must hold down the Option key before starting OSX.
If you are using the "Hard Disk" installation mode: After rebooting, select the UNetbootin entry from the boot menu.
To be completed !!