The IE file download dialog - how to hide the from field?

I need to hide the From field on the standard Internet Explorer开发者_开发百科's file download dialog. This is necessary for security reasons. The picture to look at is at http://www.filedropper.com/howtohidefrom

Any ideas?

You can't. And it's best that way.

This is built into the dialog box. You can't remove it, without lots of IE hacking, which will produce its own set of security problems.