[CentOS-virt] Install virtual guest from console

HI all,

 Is it possible to install a virtual guest (FreeBSD and OpenBSD
mainly) from kvm host's console? I have tried to do some search about
this but I haven't found anything about it.

 My idea is to launch "virsh start guest1" and inmediately "virsh
console guest1", but it doesn't works until serial console is
configured inside guest ....

Any tip?

Thanks.