Audio sound static and workaround problem

I have created a video on my Movie Maker.
This video also contains 4 seperate audio/music that I added on the movie's
duration (wave format with no quality problem).

When I saved it as DV-AVI file, I noticed the sound has like a small "spark"
static sound once in a while during gameplay.

I read from PapaJohn that it's a bug on the DV-AVI on how it's encoding the
audio, he recommended to:

"save it in a few passes, the WMV file to get the good audio, a DV-AVI file
for the good video, and a final pass that combines the audio and video from
the first two
passes. "

The question I have is how is that done exactly? This is what I attempted
from what I could understand:

1) On that same movie project, save it as a "DV-AVI" .. and again save is as
a "High Quality video (NTSC) WMV"?
2) From there combine both passes of DV-AVI (mute the sound) and add the WMV
(as the sound) then save it as "DV-AVI" as the final pass.

But the problem is in doing so (during Step #2).. one video is 3 second
shorter than the other (DV-AVI is 3 second shorter than the WMV one). Thus
if I combine those two together, somewhere along the line, the sound will be
behind.

Anyone have an input on what I did wrong or how I can fix this problem?