of course it's possible.  but how much of the car do you want to
disassemble to make your car illegal?

The only ways I know of for shutting up the alarm:

1) Cut a buckle off a belt at a wrecking yard. Stick that in the receptacle
for your car's belt buckle;
2) Unplug the electrical switch at the receptacle. This does
the same as #1, but permanently.
3) Unsolder the beeper itself from the Multifunction control unit.