I'd like to create one of those "stacked" action shot images where multiple exposures are combined to show the subject moving across a static background. Here's an example I found on Flickr (by Laurence Asuncion): http://www.flickr.com/photos/dfunkpinoy/2755832144/
Ideally, I'd like tips both for the photography part of this and for post-processing. For example, I'd imagine I want to shoot manual w/ the same exposure for all shots (as with a panorama), but I'm not sure if there are any other helpful tips for taking the shots. At one point, for example, I thought I'd have to tripod-mount the camera and keep the same framing for all shots, but I've now seen several examples where the composition moved from shot-to-shot.
I'm also interested in recommendations for post-processing -- software, technique, etc. I can envision a manual process where I stack layers and align them by hand in Photoshop Express, but I'd be surprised if there wasn't a better way — maybe using a pano tool like Hugin.