joing to svcd mpegs

[downer]

This might be a dumb question but please bear with me.
I have a movie that fits on 2 SVCD's. I want to mege them onto one DVD. I use TMPGenc to merge the 2 mpegs and when it is producing the video and audio streams i see a difference:
video -> 6229.31
audio -> 6229.34

When I play the merged mpg. It is in sync for the first 40 minutes or so but then it goes out of sync. I am assuming the problem is up above.

Is there anyway to fix this?
Any help would be greatly appreciated.

Thanks

[Poplar]

I have said this before and I will say it again: there is no need to merge mpeg-2 files. Just burn them as separate files and let the authoring program do the joining or whatever. Why do you think there are so many VOB files on a DVD? Isn't it better to merge them all together? Those guys in those big Hollywood production companies must be dumb? Don't you think?

[downer]

How would I go about doing this?

What software would I use, what would be the steps?

Thanks in advance.