Any suggestions on programs to piece together avi files?

for instance, most DVD's are 4 (or more) VOB files, so using mplayer it's easy to convert each VOB into a file... how about splicing all them together into one video?

Actually, it's probably a non-issue if the media player plays files in a directory sequentially automatically... then AdventChildren2.avi would play right after AdventChildren1.avi .... damn, i'd try this myself to see if that happens, but i lent my phone to my boss for the day