First go download tthe 21 day trial of Elecard MPEG-2 Decoder and Streaming
Pack at http://www.elecard.com/products/products-pc/codec-pack/149/mpeg2-decoder.
Then change the extension of your VOB files to MPG or MPEG.
Now you are ready to import your videos to MM. It is the only MPEG-2 decoder
that works in MM2 (powerdvd se, intervideo or sonic/roxio cineplayer decoder
do not work correctely or not at all).