I know i ask alot of questions !!!! but how do i knock down those walls when trying to use the arrow of extrication to get to the of the imperial guard quarters ?????

If your talking about the 2 pillars that are in the main room where you need to shoot the arrow at the statue then prepare for a pro longed journey. climb the stairs and if you face the bridge from the top of the stairs go towards the left side and you'll see a passage, before heading down the stairs in the passage towards the enemy's look left, you'll see a switch. After you click it, kill the enemy's and follow the passage till you cant anymore, at the end you'll see a 2nd switch. Once both switches are in place return to the main room and both pillars should be lifted allowing for you to proceed with the mission.