I have produced DVDs using my Panasonic DVR. The original source for the movies may be a TV show, VHS tape, my analog camcorder, or whatever.
Now, I am trying to edit some of these DVDs using my computer.
My DVR manual says it records the video in format mpeg2 and the audio in Dolby. All I want to do at this point is read a DVD, cut out some content, and create a new DVD.
I am really a newbie and I do not know all the formats.
To me, that means editing VOB files and authoring a DVD.

I would like a recommendation of the best tool(s)/process for doing this.
Ideally, I would like to see this work using a trial version before I buy the tool.
So far I have tried an OEM version of Nero 6.3( which imported but lost the sound), and Magix Edit Pro 11, which refused to import a VOB file and says the file is a bad format.

Also, I read about Codecs causing problems. Are the steps I should take to clean up my system before I try this stuff?

Thanks for you help.