I would be using the DVD Recorder as a central point so you are able to record the VHS to DVD and the HD TV to DVD aswell.
To do this you may need to purchase another device because the DVD recorder only has an input for one device in the back of it. Something like this (http://www.my-batteries.net/images/others/3-Way-Audio-Video-AV-RCA-Switcher-Switch-Splitter.gif) will allow you to have more then one device into the one input on another device.
I would plug the HD Converter and the VHS into this, still with the antenna hanging off the hd converter, then I would plug the output of this spitter into the DVD recorder and then the Output of the DVD Recorder into the Television.
You would then need to use the Splitter to change the channel between the VHS and the HD Converter. But this would allow you to record you VHS to DVD and Record Television.
A long way around it but it would work.