I just checked it out to see what would happen.
It places the narration in front of the MP3.
Here is one way you can do what you want but it takes some effort:
1. Place your MP3 in the timeline.
2. Place an image in the timeline.
3. Drag the edge of the image so it shows through the entire song.
4. Save this compilation to your computer.
5. Now import the newly made video into WMM and drag it to the timeline.
6. Now your MP3 is actually part of a video so it will show up there.
7. Now you can play it and record your narration.
8. Save your video.
Now if you want to make this audio only and remove the image that is quite
easy at this point. Simply import your newly created video and drag it to
the audio portion of the timeline. When you save it you will be given audio
options and the result will be a WMA file with the MP3 as well as your own
voice singing.
--
-Wojo
MVP - Digital Media
Wojo's Web:
http://www.wojos-web.co.nr/