did i read somewhere you can trick the alarm into thinking the top is up (thus enabling the motion sensor) if, when you push the lock button on your key, you have a finger up in the top lock (where the bottom of the red clip goes)? this would assume (1) your finger works as well as a piece of plastic (it does, i think -- jam it up there and the radio goes out for a second -- 987);and (2) that the alarm only "checks" for a closed top when it is activated -- if so, the motion sensor just stays on . . . .
i would prefer that to the clip.
please let me know if i am greatly mistaken in thinking i read that -- haven't tried it myself -- might just go out and try it now.