So, at the end on pg 54, it says "To skip unwanted parts
Press [pause button] to pause recording. (Press again to restart recording.)" So, they aren't specific that you would be pausing the DVD or the VHS cassette, but its a note that seems to be for both (because its below that dark line?). So It would seem at the end of your movie, hit the pause button that should pause the recording, then get another one of your movies in there ready to go and start the recording again. You might want to first get all the tapes prepared first so that they start right where you want to begin recording (to minimize goofing around time ).
If anything a little trial and error is in order, hopefully you got your blank dvd's on sale