A GTA fan has found a way to fly a helicopter in Grand Theft Auto: Liberty City Stories, the first PSP instalment in the series.
The fan, who goes by the name gmrxbox, gives instructions as follows: "On the mission where you follow Massimo on a tip from JD (he has a helicopter that you drive under and you can't lose him), follow him until the second stop (when you climb up the building to find him).
"Use a motorcycle to climb up the steps and reach the top. You will pass through the yellow marker and can go get the helicopter. Happy flying!!