Use a program called dvd region free (www.dvdidle.com) or one by slysoft (www.slysoft.com).. they will make windows/drive region free without having to update the firmware etc etc..
One of the very useful features of DVDRegionFree and AnyDVD is that they can disable UOPs, meaning you CAN skip the peurile copyright warnings and forced ads/trailers which are especially insidious on some R1 DVDs.