-- 
Richard Jones, Virtualization Group, Red Hat 
http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  
http://et.redhat.com/~rjones/libguestfs/
See what it can do: 
http://et.redhat.com/~rjones/libguestfs/recipes.html