[libvirt] Changing the default qemu path in libvirt

Hi All, I would like to change the default qemu path in libvirt xml and the changed path has to be used while installing VMs using virt-install. There was a similar question rasied some years back, I could not find the answer to the same. http://www.redhat.com/archives/libvir-list/2011-December/msg01100.html Is that possible right now?, If we have the support already, please point to the same. Thanks in advance. Regards, -Satheesh.