Hi Peter,
Deep Sky Stacker is free, this is good for you to view and stack your 1000D images, Gimp for processing (also free) and Registax will stack and align as well as process somewhat the philips webcam video files.
These arent exactly "press the button and its all automatic" type programs, they require a bit of fiddling around and learning, but they arent too bad. There are some astro processing tutorials here and on the web, but if you get stuck, simply ask here and you should be able to get some help.
Cheers
Chris
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