Didn't know if you knew about this newish version. It stacks images on the fly .
DeepSkyStacker Live features:
* Automatic stacking of incoming images
* Preview of the resulting and last image
* Compatible with all DSLRs and CCD Cameras
* Live statistics
* Customizable warnings if something is going wrong (clouds, drift…)
* Very simple User Interface
Info and download here.
http://astrotips.com/modules.php?op=...pic=7&newlang=