[Users] virt-manager migration

Quick background: I have a number of hosts already running SL6.5 and have been using virt-manager with them for some time. All of the guests are by-id fiber channel LUNs. I'm attempting to migrate from virt-manager to oVirt. I'll be dropping my SAN array and migrating all of the LUNs to a gluster system, which will be exporting the images to my blades over SCST or LIO. FC is what i already have and won't saturate my network as opposed to trying to use the 1Gbs network cards. Gluster is being used for redundancy and geo-replication, but not image hosting to the hosts. Anyway, long story short. I'm having a difficult time finding documentation on migrating from virt-manager to oVirt. As well as installing ovirt-nodes manually. I'd love to find this perfect world where I can just install the ovirt-node RPMs on my already running Hosts and begin to have them managed by the oVirt engine. Without and serious downtime. Any suggestions or pointers to documentation would be great. Even comments as to making this transition smoother or approaching it differently are appreciated. thanks, -jj-