lexus is300 dome light

does anyone out there know how to change the overhead dome light on a 2001 lexus is300? i have gone through the manuel and attempted to figure out how to pry off the cover without ruining it- this light is the one in the center front of the vehicle in between the drivers and passengers side light, it comes on (or at least when the bulb is not broken) when the vehicle doors are open. please anyone... thank you~

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