what kind of "tool" ? A plug in mod? A Pic chip?
I know that for a few years now a plug in chip has been available for the Pioneer dvd players. But I've never heard of one for a Toshiba.
If the "Tool" is from a specialist then it must have been tested beforehand

But if in doubt, get someone who knows what they're doing to fit it
If you've downloaded it then ......

.. don't do it!!!!