For creating panoramas I'd recommend either Hugin
, which is free, or AutoPano
, which isn't free (99 Euro).
Both allow fine control over syncing of points between images, with hugin being a lot easier in this regard, which IIRC you can't do under AutoStitch.
hugin also has options to input the camera lens specifications to fine tune the correction a bit more - if you know them or they're in the EXIF data.
The panoramas in this post
I made were created with AutoPano 1.40, (images 2, 5, 11, 12 are only single photos - everything else is a panoramic composition).