A couple of years ago my mechanic replaced my front brake pads with”better” ones . They were squealing right from the start which he said would go away as they wore down. Over time they did improve a bit. When I asked him about it again, he said I could try putting the antirattle shims back in. So in the box with the old pads are indeed the shims and springs. Looking at the caliper, the pads are so thick there is no way to get the antirattle shims installed. I pulled the pads with some degree of effort. The dust boots are shot. They were basically just sitting in the space, not attached to the piston or the caliper. Correct pads and seal kit are on order. The manual shows replacing the dust boots without splitting the caliper. Is this actually achievable?