Malte, a student of mine is extending an existing installer for linux based that does all the stuff with one command. We will submit the installer when finished.
I also think we should provide the community with an improved package builder to be used as the toolkit to start with for those interested in OpenACS and dotLRN development.
Regarding the documentation maybe we should start with our book project ;)...the first step would be to get all the how to and little tutorials that are in the web together with the official documentation and work on the table of content. Once this is set we could start writing.