Would be an idea to partition your hard drive if you get a new one, and place all your mp3's on your non windows drive, this way, anything happens with windows again, you dont lose a single mp3.
try to use your fooked drive as a slave drive then at least you can see what files are on it and try and salvage something cos even if your system files are shafted at least the non windows files will not be.
Also could you not get through using the windows in repair mode (r on windows disk log in)
log onto partition 1 and type chkdsk /p
let that finish then type fixboot
then try n reboot
well worth ago
if not then i agree with myk new drive n windows
if the fooked drive music files are salvagable with it being a slave then back them up on cdr asap!!!!