i was waiting on your reply so i did a little googling to try and resolve your issue this is what i came up with
with the EZ drive clone tool you are trying to clone from an internal harddrive to an external harddrive. EZ drive clone acts funky when you try to clone from an older drive to a new drive. here is were i referenced the issue form
http://forum.crucial.com/t5/Solid-State-Drives-SSD/How-to-clone-a-pre-2006-HDD-to-an-M500-with-EZ-GIG-IV/td-p/133448
to resolve your issue you need to swap the direction of how you are cloning your harddrive. What i mean by that is right now you are trying to clone from the internal harddrive, your source drive which is older, to a newer external harddrive, the external usb harddrive. what the solution i link suggest is that you take your internal harddrive and put THAT into the EZ drive clone usb enclosure, and you take the harddrive you would like to clone to, your destination harddrive, and connect that internally in the computer. then you use the EZ drive clone boot CD, and do a drive clone from the USB harddrive, now your source where your operating system is located, to the internal harddrive, now your destination harddrive that you swapped to your computer.
sounds a bit complicated but that should work.
another alternative is to use a free program called Macrium Reflect free edition which can be downloaded here
http://www.macrium.com/reflectfree.aspx
now i have used this program and how it works is that you install the free edition and you can clone your harddrive while you are still using windows to your external USB and there should be no issues.
now in Macrium reflect you can also create a Rescue CD, in the program you go to Other task and then Create Rescue Media. Now once here you want to Create a Windows PE 3.1 rescue media. Click the Advanced option and select Windows PE 3.1 and create that one. for the PE Architure the 64 bit version should be sufficient. you can i think burn it to a live CD or create an ISO and burn from that option. once the rescue CD is created you can now restore your backed up partition from system boot to any harddrive you desire
think to note.....
1. changing block size? as the other person suggested please dont do it it can cause errors
2. copy and pasting files manualy to another harddrive and then trying to create a bootable harddrive. i just dont think that'll work very well.
i hope this helps