I was intrigued to see what is this XBMC all around and found that thread

in

XBMC forum: http://xbmc.org/forum/showthread.php?t=36988

L ooks like there is a way to stream live TV to XBMC from VDR already. Any reason you don't use that option and prefer to have 2 frontends?

its working, but its not easy to zap ! and that's also why I use a second frontend

sp