Man is doing this also I pulled off my front caliper today (mine is the front pass side) and the little retainer clips that hold the pad move around so tomorrow I'm going to buy some grease or something to help them stay in place cus its annoying as shit and everyone looks at you its embarassing lol

 

I think Bill is right on the money here...my rear brakes were making a lot of noise but weren't anywhere near the wear indicators. I did everything you could possibly do short of replacing the pads, but the noise didn't go away until I greased the backsides of the pads.

Another clue for you to check...with my car, I would get the noise under light braking, but not under heavy braking. If your car is the same way, I would definitely take the time to pull off the pads and grease them a bit.