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If you want a bit more flexibility creating your DVD's try DVD-Lab from here You can download a 30 day trial.
To create a DVD I tend to use more than one program.
I use Ulead Video Studio 8 to copy, edit and compile my videos to MPEG2 format. Then use DVD Lab to create the final DVD and copy to hard drive. If the DVD is over size you can then recode using Nero and then finally burn the finished product to DVD.
Have Fun. Four hours of video to edit should keep you occupied for a very long time.