Download the imager.py file. Copy imager.py and .iso file into the home directory. Rename the .iso file into 'os.iso'. To make it executable write the command in terminal:
####cd /your/script/path ####sudo chmod +x imager.py
To run the script write:
####sudo ./imager.py
Now, follow the instructions from the program.
####N.B. To reformat and encorrect the partition of your USB device, using gparted is recommended.