Audio problem

Ok, I have some DVD5’s that are unencrypted that I want to copy. Sounds very easy right? Well the only thing is the audio is mono and is only coming from the right speaker channel(the DVD’s are onboard racing footage). I would like to make it so when I copy the DVD the right audio channel plays from the left channel as well. What program would I use to do this? I assume I just rip the DVD to my hard drive and then use a program to rip the audio from the VOB’s and remix it somehow. Can this be done with any of the transcoders or encoders out there?