finally, after some tinkering, i was able to upload my coldplay songs using a myspace mp3 player in my myspace profile. for those who are interested, here are the steps:
1. Go to Profile Pitstop.
2. Access their myspace mp3 players page.
3. Select your preferred mp3 player among the list.
4. You can then use singingfish or upload your files to fileden to generate an mp3 URL. Fortunately, this site also has its own mp3 url generator so you don't need to go that far.
5. Copy the URLs and then generate them.
6. Paste the code in your About Me section.
Actually, there are many other flash mp3 players from other myspace tools site. But they just worked almost the same.