Easiest way is to use something to pull the bar that releases the locking mechanism. By pulling of the door panel off its pretty simple to replace them.
As far the the squeaking noise goes, it sounds like your belt tensioner is going out. It also could be your belt or a pulley but most of they time its the tensioner. I added a picture, not sure what size engine you have but they are all the same. If you need instructions on any of this let me know.
Sean
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Monday, July 8th, 2013 AT 2:26 PM