How do I add a file for download from my homepage, example a mp3-file? Please help me:-) If i use the a href-methode, users will meet a "page not found" error, or?

Only if the URL is wrong. Go ahead a link to it, just make sure you have the link right.

See the FAQ entry How do I force the browser to download a file?

Thank you very much!! You have been very helpfull!