This is perhaps a rookie question, but I couldn't quite see the answer anywhere else.  I've been working on copying/ripping my DVDs down to a NAS device (Ready NAS 1100, for those who are curious). While working on the Lord Of The Rings (all 87 discs), I thought to myself "why am I creating two directories to hold the IFO/VOB files for part I and part II of the same movie? Surely, there must be someway to concatenate the two disk contents together and make one seamless movie!"  Anyone have any suggestions? Or, even better, step-by-steps?