I'm not sure if you are aware, but there is no "StangNet" staff waiting around to answer your questions... If you needed an immediate answer, you should use Google or a similar search engine. There are plenty of internet write-ups on how to change brake pads.
Did you compress the caliper? If not, with the new, thicker pads, it's no wonder that you are having difficulty getting the caliper to fit over the rotor. DO NOT open the bleeders while changing the pads (unless you are trying to make a huge mess). You can buy or rent a caliper compressing tool, or use a large C clamp.