You can see after you have posted if a new message in the mean time has entered between your latest post and replied post(not a problem on this small forum). Then you can edit your post and quote whats needed. Another stuff happens when you quote a post, an email are sent to the user.
Continue discuss quoting here: http://forum.mikrotik.com/t/does-quouting-quotes-of-quotes-in-consecutive-post-make-any-sense/144357/1
This thread is a about 7.6. Make a new thread about Netinstall. I never have needed to do it. One reason is that I never upgrade the first day after new releases, so avoid mayor flaws.