Gain access to the back of the lock that you want to make universal, ie the same one as your ignition. Put your key in the lock barrel then take the c clip off the back of the barrel push the barrel out with your key still in it. The shims are spring loaded so don't take the key out til you're on a work table. Take note of the numbers and order of each shim ie 1,7,4,5,5,3. Then reassemble the barrel and reinstall. Repeat this process for the locks that need a different key, only changing the shim numbers and order to match the combination of the first one. Then you will have all locks tha