[Libvir] libvirt and dnsmasq question

I have Fedora 8 witch contains: libvirt-0.3.3-2.fc8 This version of libvirt automatically starts a copy of dnsmasq if it exists. Is there a way to specify a dnsmasq.conf file that this will use or specify command line options for dnsmasq when it is started? There are dnsmasq options and config changes that I'd like to specify but I can't figure out where this would be done. libvirt does not use the /etc/dnsmasq.conf file or start dnsmasq using the normal init scripts. Thanks - jack