How to align sequence of photos?

In article
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wrote:

Hi,
I have a sequence of time-lag landscape photos which are supposed to
show the same view. However, as the frames were taken ca. 2 weeks
apart from each other, I didn't quite manage to stand always on the
exactly same spot and point at the exactly same point, so there is a
slight variability in the position of the objects within the frame
between the frames.
My question is: is there a software/procedure which is able to align
and possibly also crop several frames so that a smooth sequence can be
created from them? Surely this must be a common problem. I have never
made such a sequence before, so I am not quite sure what is the best
way to proceed.

photoshop cs3 or cs4 has auto-align. just open a bunch of images and
let it do its thing.