Changing the recording directory and delete old records

Thanks for the nice work from Lars, I have a XMBC with VNSI Live TV running.
So far everything works, but the scheduled records are stored in my system partition under /var/lib/video.00. How can I change this folder to my much larger data partition under e.g. /media/data/videos/tv/?

Also I have problems to delete an old recording from the XBMC frontend ( I select the recorded video, press "C" to get the context menu and "delete", but it gives only an error message). How can I delete old recordings?