Steps
- Boot from Clonezilla Live CD
- Select "Clonezilla live" (default entry in boot menu)
- Choose keyboard language
- Select "Enter shell"
- Choose "cmd" mode
- If the script resides on /dev/sdb1, then "mount /dev/sdb1 /home/partimag" now (the mount inside the script will fail, but that doesn't matter)
- Run script ("sudo ...")