Is there a Tool to smooth the DVD when it plays Out??

I used TMPGE to Combine two MPG file the I used Spruce it up to author it and write Title-Audio, Video file then burned it with Nero... When
I test it, using power dvd xp, after it's burned it skips and is slow at some points... The audio is faster then the picture...

Before I author it I tested, the Combine MPG file in simulation mode and it's fine, but after the audio and video file is made and I burn it, its a little off. I am using same Media I use for all my dvd's and they work fine.

)1
Is there a tool to smooth it out
2) because when I test it with windvd it played smooth, it used some convergence as it played-*convergence win dvd2000
3)when the audio and video file is made is there a certain order you must drag the files into nero for burning or do I just drag the file in and burn it?


ThanX