Well, my original point was (I think ) that Netscape has (had?) a simple (if underdocumented) dialog to edit what programs would be used for what downloads depending solely on MIME Content-Type. MSIE has nothing like that. The best you can do is map a C-T to a filename extension and then make that extension's program be something useful under the basic Windows mappings. And I'm not really sure that setting the C-T to extension mapping does anything useful. IE might still base everything solely on extensions, which would mean that if I were sent a file mpegs.txt with the content-type set to audio/x-mpeg-url (or whatever it is), IE might still open it in a text editor instead of sending it to WinAMP. I'm too lazy to test it.