Windows 7: I Need Replace Sound In Videos File

Sorry For Start Thread Again. But This Is My Work (Send to My Teacher)

>> I Need Replace New Sound Into My Videos File. Example I Don't Need Old Sound At 0:10 - 0:15 In My Videos And I Need Replace It With New Sound [e.g. MP3/WAV]

What Programs Can Do That ? And Please Tutorial

Have you tried MSFT Live Movie Maker ? It lets you edit the soundtrack (change it).

Use your start button; search for movie maker. If not there, then you'll need to download Windows Live Essentials. And I think you can just install one component (Movie Maker). If not, just install the whole suite of tools.
Then run Movie Maker.
Import your video.
And then select a new audio track.
Then you can edit the audio tracks.