You can change the region code by pressing specific set of keys in remote(hack), search around in the net with the model number of your dvd recorder and you will find the guide for the region code change.

Look in the following link, many toshiba models are listed in there.
DVD Player Hack list. Looking for a hack? Start here. - AVForums.com

This site may also of some help to you
VideoHelp.com - Forum, Guides, Tools and hardware lists