I know this is an old topic but i want to add some info that might be helpfull for future reference.
Years back ik started to setup a multi room VR system with a XAP800. Now i have this running for years now and i kept a blog with my findings, results and solutions on VR and whole hpuse audio
Now i setting this up with voxcommando as VR to control my HomeSeer system. Previously is developed my own VR client to work with Dutch. At the pages below you can find many tips and background info why you should do things like that or not. Also available is the vbscript file to control this and the PSR file to configure your XAP800
For general information about setting up a whole house audio system
http://members.home.nl/b.vanzoelen/ZMC.htmMore detailed information about setting up VR
http://members.home.nl/b.vanzoelen/ZMCVRpart1.htmHope this will help anyone.