I'm on a Mac, and unfortunately, it doesn't look like it is available.
1. Any other recommendations?
2. How long of a clip can you use for a documentary, movie review, etc.
2. Don't know that there is a hard and fast limit, at least here in the U.S. You use everything but the credits, and a judge would likely say 'infringement'. You use 5 minutes of a 2 hour movie, you're probably safe.
1 - If the VOB is not copy protected, you may load directly into Premiere Pro
Read Bill Hunt on editing a VOB/MPG file http://forums.adobe.com/thread/464549
2 - Google is your friend... and ask the legal advisor where you teach
3 - That depends on the publisher... there is no single answer