Since (according to lexus dealer) we don't have any TPMS on the CT200h in sweden, it should be able to disable in some way!?
Its only electrics and since there probably isn't any RF-transmitter in the ECU, there should be an external box, and then its probably just to find it, define the wire-function and just ground or put a resistor on a wire.
I cant test since I havnt got my car yet and when I get it, it dosnt have any TPMS. But get a service manual and you will be set.
If its to messy you could simply take the cluster out and tape the lamp so that you dont have to see it
A third solution is to take a tube from a moped or something, cut it so that its a C instead of an O, throw in your sensors, seal it in both ends. Fill it with the right pressure, throw it into some nice space in the car. Live happily ever after
EDIT: I fond an example on the Prius. As you can see in the pics they have posted, they have managed to find the box and the way to "bridge" it. Im sure its possible to do on a ct200h too, its just to find out how.
http://priuschat.com/forums/gen-iii.../77254-idea-fool-tire-pressure-sensors-7.html
If you want to be legal I think the orange programmable sensors is your best shot thou.