For those using a PS2 as their main DVD player..
To access the cut scenes, go to the "Video Game + Still Gallery" section on the bonus disc. This will take you to an animated menu of the gang on the Millie. Press 1 TWICE. A yellow box will appear to the right of R2. Press 03, then there will be a pause, then press 08, and the screen will go black, and take you directly to the cut scenes.
If you don't have a PS2 DVD remote, you can access the same menu with your controller. Select the same section as above, hit X. When you get there, use the SELECT button to bring up the character menu. PS2 allows you to enter 2 digits at a time, so enter 1 TWICE, and press X. Then, press 03, press X again. Finally, press 08, and press X , and the screen will go back, taking you directly to the cut scenes/credits.
It is the exact same way for those using a normal DVD player.
Using your remote, press "10+", "1" (or "11" depending on your player) and wait for the pause as the player accepts the input (note that a small box next to R2-D2 will illuminate if you're on the right track). Then press "3" and wait for the pause. Finally, press "8".