After being locked in jail where do I find costington?

After you have been locked in jail and got Fred, Velma, and Daphne out of Jail you have to go as far left as you can and then go up those stairs and then use velma to the colour wheel identification, then cross the bridge, go down the stairs, and then up the other stairs and then go left and jump down and then switch to Daphne to go up the glowing pink rope and get the gear jump down go up to the lever and the gear should be taken out of your hands and then pull it. Then you have to go up to the large box change to fred and get him to pull it out so you can then jump on top of it and get up on the roof top. Then all you have to do is cross the bridge on the left go down the stairs and follow the road going straight from there to some stairs and a gate. When you get to the gate you have to go over to the box type thing on the wall besdie the gate and push Z to talk to Costington adn when you are done talking the gates will open and all you then have to do is go straight go up the right set of stairs and then head to the front doors and Costington will be there waiting for you and all you have to do is push Z to talk to him.