how to merge two MUSIC into one with windows movie maker??

[kenny1999]

In fact I've got four music files in mp3 format, no screen, just audio. I'd like to combine the four mp3 into one single mp3 file, together with some pictures (this is not very important part for me), to make it available to be uploaded to YouTube.

The four music files were in fact one single mp3 being split by someone else into four files, so just have them play continuously after each other, and no fancy effect is needed.

Look forward any volunteer who would show me how that would be done. Thank you

[redwudz]

Maybe use the freeware Audacity audio editor and append the files together.
Then you could add the new single audio file to a video with a video editor.