Items used: Parted Magic CD http://partedmagic.com/doku.php
Putty http://www.putty.org/
External Hard Drive
The Parted Magic only would connect on the 1st motherboard nic, usually eth0. PCI nics would not get an ip. Have machine set in bios as 1st boot device cd-rom (I leave mine that way). Put Parted Magic in cd-rom and hook up usb external. I used an older external. A newer western digital had issues. Let it boot for like 5 minutes. Find the ip assigned to it from your router. If you have DD-WRT you will find it on the tabs Status/Lan. Use Putty to start ssh session login userid=root and password=partedmagic You can run Clonezilla from command line by typing "clonezilla". For Instructions on Clonezilla watch vids on YouTube.
PS- the issues with the external Western Digital Drive were due to some of the software they had put on it. It you have a similar drive and wipe it clean there shouldn't be any issues.