how to run the vm-tz example?

Hi all, I try to run the vm-tz example on imx51,in the example it start a linux in NS world by vm function,my question are: 1. How can i get (or build) the linux image and ramdisk files that the example requires ? 2. I want to run a fiasco in NS world use the example code ,some body can tell me how to get it done? I'm looking forward to your reply!