How to replace a puddle light:
a) get the thinnest, cheapest, crappiest butter or steak knife you can find. The thinner the blade, the better. (note: i used a 'regular' steak knife and couldn't get it to work because it was too thick)
b) The puddle light lens on the 2003 is rectangular - stick the thin blade up in the narrow end of the rectangle, closest to you (furthest from the car). Stick it in a roughly
over 1/8th of an inch. Be sure to be centered. If the blade isn't deep enough, prying motion will chip the lens.
c) Use a light prying motion, point of knife toward car, butt of knife away from car and the lens should start to easily come down on then end.. when it does, use your finger to assist it out.. with a nice thin blade it shouldn't require any additional tool other than your own digits.
d) if everything above went well, you have the thing dangling, twist the plastic plug like most of your other external bulbs and it should come out of the housing.
e) pull out the bulb, replace with new bulb, reverse process, go have some candy.
Hope it helps