basically it is
(a) the compilation of all existing walkthroughs from OPs' first pages. and other info i found.
(b) my experience of following those walkthroughs (or failing to. with my solutions and other occasional comments)
(!)if options you have differ from what i describe - you most likely use original game files without english translation project files
(c) feel free to pm so i could add some missing pieces... & i probably missed some chars' last quest steps (like julia appartment)...
search words, just in case :]
walkthrough guide hints tips help routes pathes choice answer option trigger variable scene alt
step line tweak code change skip chain what to do next after before how do i cannot find where is when to how to spot