Yeah, don't expect to be conquering this imaging thing anytime soon Mark. It takes quiet tweaking of one or two variables max everytime you head out to get any sort of successful routine together. Then you'll find that Registax etc take even longer to explore and get the best out of. You've got some cracker shots there for a first effort though. All really useful and productive piece of kit to have is the trusty ToUcam.
Helps too to frequent the solar system imaging forum and ask lots of questions from the experts. Most of them have moved on to super fast dedicated cameras and RGB imaging, but will still be able to provide heaps of critique on your shots and help you along (as the guys are already doing).