Hi Barry I am not sure what to suggest definitively. I know PhotoShop, CCDStack and ImagesPlus will all do it, but if you pose the same question in the software forum someone will probably suggest other suitable programs.
http:/http://www.iceinspace.com.au/f...splay.php?f=13
We don't have a beginners section this year but we are looking at that for next year. At least with the image processing it is a level playing field.