My first attempt when i ripped it with DVDfab (www.dvdfab.com), it copied the movie to the folder i wanted, but the video did not have audio.
When i tried to rip using Handbrake (www.handbrake.fr), the handbrake software could not crack the protection.
When i aimed handbrake to the folder created by DVDfab, and clicked start encode, handbrake would act like it was going to then it would quit instantly.
Okay, now the solution: Use DVDfab to rip the full movie, that means every little bit (previews and extras) and put the data on a device that will have enough space, such as an external hard drive.
so now the data is the location you told DVDfab to put it in, now in the source section of DVDfab use the folder icon to select the full movie folder that was just created where Iron Man2 is. Select Main Movie on the left panel. Now DVDfab will scan the folder you created and a list of tracks will come up and the longest one is the main movie.
Next to the target section at the top of DVDfab, click the folder icon and aim the new target folder to preferably a different location than the first (maybe an internal drive, but if you can't don't worry same drive is fine) and click next, then start.
Once DVDfab is done creating the main movie folder in the new location, DVDfab's job is done.
Now open Handbrake, click source on the top left and click on the selection that has DVD/Video_TS folder next to it. Then find your main movie folder that DVDfab created, then click on the Iron Man 2 folder then click okay. Click the start button at the top.
Wait for the video to finish converting (conversion time will vary depending on your processor)
When its done, enjoy watching Iron Man 2.