See
http://www.pctools.com/guides/registry/detail/442/ for the registry
restriction for File...New.
File...Edit uses the default editor set in Tools...Internet
Options...Programs tab.
Delete the data value in this registry key:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Default HTML
Editor\shell\edit\command
File...Send (by email choices) is controlled by whatever is set as the
default email client here:
HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail
File...Send (desktop shortcut) is controlled by:
HKEY_CLASSES_ROOT\.DeskLink\PersistentHandler - delete the value there.
Of course, back up your registry by exporting any values you want to change,
in case you want to put them back. Do not edit the registry if you are not
comfortable doing so.