I have similar problems,
Particulary in the cold I used to have creaking coming from my all over the joint. I got under the car and sprayed all the joints and bushes and everything with lube, and tightened all the things that can loosen up with the impact gun, it seemed to work for a couple of months. Now I have only 1 creak, and that comes from the front right of the car. I'll try lubing up again, but I think the proper soloution would be to get new bushes (in my case) can anyone confirm this?
On another note I have another creak. It happens when I turn right around roundabouts, or 90degree corners in suburbia (with a little speed). The cars weight shifts to the passenger side, and the drivers side rises. When the drivers side comes back down as the car straightens up thats when I hear the creak. It seems to be coming from the where the door connects to the guard (rear gaurd - door handle end)... I have absoloutly NO idea what it is. Does anyone else have this problem, or does anyone know how to rectify it?