mannam karala thiyenne windows media player eken

iTunes ekenuth puluwan

If you have iTunes its very easy.
if u dont ....just dowload it at
www.apple.com its free
Then, what you have to do is add your mp3 files into iTunes library. Just go file, add file, browse and click add.
Once its added, right click on the mp3 in the iTunes library. select 'Get info'
Go into the 'artwork' tab. select add. brows & find the album art image from your system then simply hit OK.
and there u have ur album art!!
http://answers.yahoo.com/question/index?qid=20070909052335AAwYEoL