[SCRIPT] Low tutorials regarding insanity events

[Hauken]

Hey, I did do some search on the forums and google but I found close to nothing which I need.

question 1: When and how do we use the Insanity area scripts?
question 2: How can I assign to have flies crawling on the players screen while inside a script area?

So far I understood we need to call events from main_sanity_events.cfg but I only found codes to activate random events, which is pretty much anything like Daniel speaking to himself, I kinda just want to have flies crawling on the screen (frictional's work) within an script area.

Is this possible? I did do some looking in the morgue.hps but I didnt get much from it, I also took a look at engine scripts but found little.