MsWindowsXEmacsGnusRegistrySettings

Save following text in a file with .reg extension:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\XEmacs Gnus]
@="XEmacs Gnus"

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\XEmacs Gnus\DefaultIcon]
@="c:\\Program Files\\XEmacs\\XEmacs-21.5-b28\\i586-pc-win32\\gnuclientw.exe,0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\XEmacs Gnus\Protocols]

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\XEmacs Gnus\Protocols\mailto]
"URL Protocol"=""

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\XEmacs Gnus\Protocols\mailto\DefaultIcon]
@="c:\\Program Files\\XEmacs\\XEmacs-21.5-b28\\i586-pc-win32\\gnuclientw.exe,0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\XEmacs Gnus\Protocols\mailto\Shell]

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\XEmacs Gnus\Protocols\mailto\Shell\Open]

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\XEmacs Gnus\Protocols\mailto\Shell\Open\Command]
@="c:\\Program Files\\XEmacs\\XEmacs-21.5-b28\\i586-pc-win32\\gnuclientw.exe -F -w -e \"(and (gnus) (gnus-url-mailto \\\"%1\\\"))\""

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\XEmacs Gnus\Shell]

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\XEmacs Gnus\Shell\Open]

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\XEmacs Gnus\Shell\Open\Command]
@="c:\\Program Files\\XEmacs\\XEmacs-21.5-b28\\i586-pc-win32\\gnuclientw.exe -F -w -e \"(and (gnus) (gnus-url-mailto \\\"%1\\\"))\""