Canister 1: Sitting near the secret area entrance.
Canister 2: Enter the secret area, indicated by a large grey door. Sitting in the upper back corner.
Canister 3: In the secret area. Defeat all 10 Turrets with Torpedos. Once this is done, the Canister spawns under the bridge.
Canister 4: Sitting near the back of the area, near the large group of Turrets.
Canister 5: Defeat all 10 Turrets with Torpedos. It then spawns in the far left corner.
Canister 6: At the southermost point of the large area. It's just sitting there.
Canister 7: Head into the secret area, defeat 10 TIE Fighters to make this spawn in the uppermost corner.
Canister 8: In the secret area, defeat 10 TIE Fighter to make this spawn the the corner around the bend from the last Canister.
Canister 9: Sitting in the uppermost corner.
Canister 10: Sitting in the lowermost corner.
Unlocked Vehicle: TIE Fighter (1,000)