does it give you any warning sound ? or only the light?
If the FX sensors are anything like the other Nissan TPMS then you can use the banding method on the new wheels.

What's the banding method?
Having a problem getting the bead to set with the sensors in. Being told that they will have to come out becuase they will have to put up to 120 lbs of air and that will kill the sensors. If I don't use the sensors, will it set a check engine code?
Having a problem getting the bead to set with the sensors in. Being told that they will have to come out becuase they will have to put up to 120 lbs of air and that will kill the sensors. If I don't use the sensors, will it set a check engine code?
You can drill another hole into the wheel to set the sensor -- Dr. 2k has done this.
And yes, it will beep every once in a while. Not a big deal.
24's, have pictures?
Couldn't he just use a few large industrial size Zip Ties and double sided tape to install them inside the wheel?