I just shared the DVD drive on my main computer, and mapped it as a network drive from my netbook. Then I launched the disknav.exe file off the mapped drive. It brought up the launcher for the digital copy, then just click on digital copy and follow the onscreen directions. It took about 25 minutes to sync the movie with my itunes on the netbook, but it worked great. If you have trouble with playback, set the battery options for high performance and it should play a little smoother.
Great movie BTW.