I spent some time to configure VDR under Plutohome about year ago. But without luck, unfortunately. What I'd like to suggest is check if vdr works as stand-alone application. The difference between integration MyhTV and VDR in the Plutohome/LinuxMCE is that MythTV is a part of the system. Possible Pluthome/LinuxMCE won't work without it at all. But VDR's integration is very pure and it supposes that VDR is installed and configured before run under Plutohome/LinuxMCE.
Actually, it'd be great to have a choice between MythTV and VDR. Here is a thread on German VDR forum about integration with Plutohome - http://www.vdr-portal.de/board/thread.php?threadid=32551
if somebody is interested in it.
What you get after installing the linuxmce-0704 release in terms of vdr is a hang-over from an much earlier attempt to integrate vdr in Pluto and it is broken. We have vdr 1.4.7 working well under linuxmce-0704 but it is still undergoing testing. So I can't say how long it will be before it will be available. But the intention is that is will be.