I just use CS5, but I am very careful to use a tripod and level the head so the pan is horizontal and I do not tip the camera.
If I can, I use the viewfinder grid lines to get a constant overlap. I also rotate about the lens node and avoid lens with significant distortion.
It is all in taking the pano and not expecting software to fix your mistakes.
I like results from my 28 or 35 shift lenses best. Three shots, full left, center , and full right, keeping the lens centered in all. A micro photo focusing rail is used sideways to keep the lens centered. This procedure keeps building lines straight and natural and you do not get a cigar shape from parallel horizontal lines like you get from rotation or a swing lens camera.
A 28 used this way covers 90 deg horizontally, about the same as a 15 mm lens