What is the objective? You realize you might end up with a king sized paper-weight?
Most parameters in the Toshiba LCDs can be set thru' locked IR codes; these are IR commands NOT available on your remote. But, since Toshiba uses the NEC IR protocol, you can make a scanner that scans thru' all the codes (including ones on your remote), one after other, and see what the screen says, and have access to menus available only to service personnel. Here too, you can brick the set if you mess up some of the parameters, so DO be careful.
Regards,
Anand Dhuru