I try do use one of the images available from 
These images comes in two flavors, one vmx, one ovf.
I do not know how to convert one of these to CentOS6-libvirt-kvm
virt-convert gives me an error
$ virt-convert -i ovf -o virt-image path_to_image.ovf ERROR Couldn’t convert disks: Disk conversion failed with exit status
1: qemu-img: Could not open ‘path_to_image.vmdk’
The vmdk does exist. It seems that qemu-img can not handle this vmdk format. I am also not sure if v2v could do it.
I think the essence of my post is the question Is it possible to use vmx or ovf images with kvm, possibly after converting them?
I try do use one of the images available from