[Old Pedant]

I think Felgall missed the end of his answer.

Shouldn't it be:

var loadJS = function(nm) {
  var s = document.createElement('script');
  s.type='text/javascript';
  s.src=nm;
  document.getElementsByTagName('body')[0].appendChild(s);
}

var drives = "BDEFGHIJKLMNOPQRSTUVWXYZ";
for ( var d = 0; d < drives.length; ++d )
{
    var driveletter = drives[d];
    loadJS("file:///" + driveletter + ":/drive.js");
    i++;
}

or similar???

But I still think that's not the best way, given that this is for Windows only, MSIE only.