First of all the key commands have to be assigned in FS2002/options/controls/assigments. Please assign them to the following: keys

Pilot's Sliding Windows -- Shift+E
Passenger Cabin Door (FWD) -- Shift+E+2 or Alt+E
Passenger Cabin Door/Ramp (AFT) -- Wing Fold *
Luggage Door/ Cargo Door -- Tail Hook *

NOTE: * -- must be assigned

Scroll down till you find "Tail hook up/down" and assign a key to it using the "change assignment" button. Do the same for "Wing Fold/unfold"