Grab a flat screwdriver and just pry off the base of the maplights where it meets the headliner...the cover should pop out.
Which bulbs are you planning to put in there?
I would be interested to see if they are brighter than stock.
is the bulb size 194 for the map lights?
i went to sylvania.com but map lights were not one of the categories. Bulb size 194 was for instrument cluster/general...thanks in advance!
http://www.sylvania.com/ConsumerProducts/AutomotiveLighting/LampReplacementGuide/AutoLRG-Results.htm