You have to pry off the door panel. The grills are not supposed to come off. There are a couple of screws that first need to come off. They are fairly obvious, one is in the handle, one in the map holder, one by the side view mirror and I forget if there are anymore. After that there are the plastic "screws" holding in the door. Someone said its possible to slide it off after some acrobatics but I just pried off the door. If you pry it you will only damage the screws which can be replaced. Their are 14 plastic "screws". I got like 40 of them from Ford for a couple of dollars. As for the grills you are going to have to glue them or plastic weld them back on.
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92 White SHO
HiRevs Competion Clutch
SHOSHOP Engine Mounts
Koni Shocks
StrutTower Braces
UD Pullies
Awesome Sound System