"EnablePlainTextPassword"=dword:00000001

Win2000: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Rdr\Parameters
Win2000: HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanworkstation\parameters
Win2000: HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\lanmanworkstation\parameters

Win 98:  HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\Vnetsup