I have a video that is two hours and twenty minutes long.  I would like to know how can I tell Pinnacle to burn one hour ten minutes on a dvd. 

You must create 2 projects.

Project 1 : insert your video in TL, place the scrubber at 1 h 15 m, cut it using the razor tool, delete the end, export as a DVD

Project 2 : insert your video in TL, place the scrubber at 1 h 15 m, cut it using the razor tool, delete the beginning, export as a DVD

Thanks for your reply, I'll try that technique as soon as possible.