Cloaking Pages

Is this possible . . . I have a menu at the top of my pages (Home, Resource, Help, Exit) linking to those pages. But I want those pages to be hidden from view, hidden from naviagating to them with the Next/Back buttons, hidden from being included in "PagesInChapter" vars, basically nonexistent until the Learner clicks one of those menu options.I don't know where to place them on the flowline that will keep them out of the way and hidden. I also have several Chapters that I don't want accessable until the previous chapter has been completed. Basically, a variation to the "Locked-down" linear approach with a left nav bar of lessons.Example: [grp] Next/Back btns [mu] Leftmenu [mu] Topmenu+ [pg] Home Page- [sec] Lesson 1: Overview + [pg] page 1 + [pg] page 2- [sec] Lesson 2: Intro to Underwater Basket-weaving + [pg] page 1 + [pg] page 2 + [pg] page 3+ [sec] Lesson 3: Holding your Breath+ [pg] Resources+ [pg] HelpSo is any of this possible? How do I prevent navigating to a page until the previous Sec/Les has been completed?