V6 Duratec or L4 Zetec engine?
I have the L4 Zetec engine and I've been able to change the belt without using any tools at all! I simply grasp the belt tensioner with my hand (under the alternator) and then pull up while removing the belt from the Power Steering pump pulley.
I've not worked on the V6 model.
I also found that the belt tensioner was broken upon removal of the belt. The tensioner was very stiff and felt as if the the spring inside was loose and probably broken. Once replaced, the belt became much easier to replace than before.
Special tools = no tools required