Custom Hittest ((Help!))

Can anyone here suggest a code so that a Hittest is done on a finishing line and a car? P.S. The user drives the car around the track, Hitting several checkpoint(or Hittested-lines) then hit the finishing line... which stops a count-down clock.
So basically I got a car instance name "car" and 5 different lines named (L1, L2, L3... L5) and a finishing line instance: "Fini1"

Thanks for any imputs,
Merry Christmas guyz,
Tongxn

what do you to happen when the car hit's the first 4 lines

does nothing, just stops a seperate stopwatch. a small um.

come on, any IDEAS??