The intention, from my understanding, is not to boot multiple PV guests inside of one HVM shim, but instead treat it as more of a packaged deal - for each PV gu

The intention, from my understanding, is not to boot multiple PV guests inside of one HVM shim, but instead treat it as more of a packaged deal - for each PV guest, you will be running it inside an independent vixen shim. So 5 PV guests, 5 vixen shims, etc.