Hi,
here is the solution,
file : quanda.php
line :2688
$uploadbutton = "<h2><a id='upload_".$ia[1]."' class='upload' ";
$uploadbutton .= " href='#' onclick='javascript:upload_$ia[1]();'";
$uploadbutton .=">" .$clang->gT('Upload files'). "</a></h2><br /><br />";
you can put what you want in $uploadbutton variable
here is the solution,
file : quanda.php
line :2688
$uploadbutton = "<h2><a id='upload_".$ia[1]."' class='upload' ";
$uploadbutton .= " href='#' onclick='javascript:upload_$ia[1]();'";
$uploadbutton .=">" .$clang->gT('Upload files'). "</a></h2><br /><br />";
you can put what you want in $uploadbutton variable