On your page under the music player - assuming you're logged in - there's a green + labelled 'Add music'. That'll take you to the upload page where you let this site knkow whether you're uploading from your comp or sending from a server online somewhere. If it's the former, you just browse to the file on your hard disk and up it goes. If it's the latter, put in the url of the file and, again, away it goes.
It does get broken sometimes, and if there's heavy network traffic it could take a while, but that's basically it. Shout if you need any more.
Thankyou dwoogie.ur a life saver.it was simple after all.i avnt uploaded any tunes yet tho,but wil b soon.i got a little confused.thanks agen.wil add u 2 my friends