viewtopic.php?f=39&t=1542Part 4 - Client and Client Files gives a good description of what to install and what not to update. I recommend putting your reading glasses back on, and finishing that post.
There's a literal shitton of guides on setting up a launcher/bat file, so no, I won't answer that question. Take a look at the Guides section, as stated in the end of the Setup Guide.
Do you need to run triggerdetect? Iunno, you might, might not, does the client crash if you don't run it? Then I say run it, if the client works without running it, well, then don't bother.
Also, I know you're new, lots of people are new, that's why we have a search feature, that's why you can browse back-topics, that's why we get irritated when you ask questions that have been answered before.