part 2 - http://video.google.com/videoplay?docid=4297080196441359688#docid=-4881247955659949586
part 3 - http://video.google.com/videoplay?docid=4297080196441359688#docid=1394883260315353104
part 4 - http://video.google.com/videoplay?docid=4297080196441359688#docid=5594961853071816089