You may find that you can make two vehicles in this area. You should do that, as at least one of them will come in handy later.

Go back to the main hallway, and work your way into the room with the blocks that you can move. Go ahead and use the force in the corner to stack some blocks atop each other. Jump up to a nearby ramp to get the Sixth Canister.

After you go out the room with the moving boxes, you will see a hall where the force can be used in a lot of areas. Most notably is a panel on the upper left hand corner past a Threepio door. Use the force there, and a secret door will open to reveal the Seventh Canister. Yeah, I know, it is a stupid place for putting a canister, and it certainly is by no means obvious. You should probably go to any area that you can use the force, and use it until you find this one.

At first I thought this was stupid, but there is a reason for building the car and truck. Here is what you have to do: go back to the areas that had the cars, and pick one. You then have to drive it down all the halls until you come to the room with the crane. (This is the one place where you pick up the stormtroopers.) Park it on a certain spot so it looks like it is going through maintenance. It will lift up, and the Eighth Canister will be revealed to you. (Man, who thinks of these Canister hiding places?)

This next canister is a little hard to find. In the last white hall with the stormtroopers, somewhere on the left side, shoot out all the panels to reveal some blue flowers. This is one of three that you have to find.

The second is behind a stormtrooper door, in the midst of some crates. I have no idea what good the Threepio panels are here.

The third is behind a shiny metal tank that you can blow up with a thermal detonator. Once all three are found, the Ninth Canister will appear at the end of the hall.

Speaking of the end of the hall, if you go to the Artoo door, you will find the Jacuzzi for the stormtroopers. Go on and use a Sith force power to pull the drain, and the Tenth Canister will appear.