It depends on your BIOS. If your BIOS allows it then you can do it. That is how
I install most Linux. I use a utility called Unebootin that writes an ISO to a
usb key. You need the program, an ISO and a usb key and the locations of each
(ISO and key). Installing doesn't come easier than this. It takes a couple of
minutes to write the ISO to the key versus considerably longer to burn a CD.

You need to either set your BIOS to use usb as the first boot device or have a
way to use a key press to get into a boot menu. Mine is ESC from first boot
screen.