It wathing DVDs from other regions is something that you will do more than once, it is much better to just buy a 2nd DVD drive. You can change the 2nd one to region 2, and leave it stuck there. If you shop around, you can find them for about $30 shipped (try www.newegg.com first). Or, you might luck out and find an old DVD reader for $3 at a garage sale.

You might also consider throwing the 2nd DVD drive in a USB enclosure. It will cost you an extra $25 or so, but you do not have to open up your computer.