In order to add a background bitmap to the Internet Explorer toolbar, you must first find or create a BMP that you wish to use. Once you have done that, open the Registry editor (Start, Run, regedit) and go to the following key:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar
Then, add a String value (Right-click, New, String Value) and call it BackBitmapIE5
change the value of this string to the path of the BMP you wish to be displayed as the toolbar background and it should then display when you open Internet Explorer.
NOTE: If Internet Explorer is open, you will need to re-open it to see the changes.
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar
Then, add a String value (Right-click, New, String Value) and call it BackBitmapIE5
change the value of this string to the path of the BMP you wish to be displayed as the toolbar background and it should then display when you open Internet Explorer.
NOTE: If Internet Explorer is open, you will need to re-open it to see the changes.