Bugs, speedruns, walkthroughs, etc. (STALKER: Shadow of Chernobyl)

What's the point?
Can you fix bugs?
Decided to speedrun? There are already hundreds of them, it makes no sense.
Questions about the passage? Stalker wiki to help. Everything is chewed up there.

P.S. if anyone really has any suggestions for editing the original PM, you can write to me. I am doing a restart of my own, (in the past unsuccessful) mod, where a lot of jambs of the original will be fixed, without changing the parameters of the barrels, artifacts, armor and other gags.