I should add that the transcoded files play at triple or quad speed when imported into the DV timeline (standard NTSC DV 48khz) and then are frozen on the end frame after about the 2 minute mark all the way to the end of the clip at 13 or 15 minutes. The audio plays at the correct speed all the way through the clip.
I've tried to transcode the VOB files into several different versions of .avi and .mpeg (2, 4 etc) in an attempt to get Premiere to recognize them.
Posting this question brought up other related discussions, from which I was able to find a solution.
MPEG Streamclip 1.2 from Squared 5 did the conversion from VOB to MPEG correctly, and PPro CS4 recognized it.
Dave Helmly does, in his presentation, show a DVD inserted into the demo unit with the result being a full edit from the DVD source footage, which can lead to confusion given the amount of variation in DVD quality one is liable to encounter when 'presented' with the 'only available' copy of material.
Thanks for the other posts leading me to Squared 5.
Glad that MPEGStreamclip worked for you. This ARTICLE will give you some background on the MPEG-2 files contained within the VOB's. If the VOB's are 100% DVD-compliant (very important), then CS4.2 will Import them fine. If they are not 100% DVD-compliant, then programs, like MPEGStreamclip are very helpful.
Good luck, and thank you for reporting your success,