[PHP] Full path to download !!!

[fr r]

i have this code working perfect to allow users to download songs from my web site, 
but the  download.php must be in same folder with any song to be downloaded.
but i have songs on another server, so i can't make the file name full path like this:
http://myserver.com/son1.mp3
 
any help plz !!!!!!!!!
<?php 
$shortname = basename( $filename ); 
if( file_exists( $filename ) // sanity check 
&& !eregi( "p?html?", $filename ) // security check 
&& !eregi( "inc", $filename ) 
&& !eregi( "php3?", $filename ) ){ 
$size = filesize( $filename ); 
header("Content-Type: application/save"); 
header("Content-Length: $size"); 
header("Content-Disposition: attachment; filename=$shortname"); 
header("Content-Transfer-Encoding: binary"); 
$fh = fopen("$filename", "r"); 
fpassthru($fh); 
exit; 
} 
else
{ 
?> 
file doesn't exsist
<?
}
?>
 
 



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