To get a stunt plane here are the codes to get that plane
circle,up,L1,L2,down,R1,L1,L1,left,left,X,triangle
for the harrier aircraft
triangle,triangle,square,circle,X,L1,L1,down,up
And for the jet pack
L1,L2,R1,R2,up,down,left,right
L1,L2,R1,R2,up,down,left,right
that all I know for airplanes