[Users] Virtual Machine Provisiong

Hello guys, I'm trying to integrate an automatic provisioning to my oVirt installation. Something like: API to create VM, NIC and Disk, tool to install SO (??). I'm actually working around aeolus (after a useless test with koan), but I'm not sure I can do what I want. I prefer not to use a PXE to get all things really automatic (something cloud style). Have you got any idea, suggestion and/or guide about it? Thanks a lot Marco