Right-click the HTML file, select "Open With" and then click "Notepad." The file is opened in Notepad. Click "File" in the top left corner of the window and select "Save As" from the drop-down menu.

Stupid question, and probably very easy answer. Basically, in XP, if I create a Notepad file on the Desktop, and name it something like 'index.html', the file shows up on the desktop as 'index ...