Do this after beating up the guy on the ship in "Spilling the Beans". The main.scm I used is probably the one from the VC guides section which is probably international retail. I compiled it and replaced the jp scm with it. The relevant parts of the main.scm are identical in the jp and "guides section" scm.
It's only useful for 100%. You replace StB instance with RC Raider Pickup, which obviously kills StB instance, so you can't finish the mission. You have to start and do it all over again.
The answer to that question is in the first post. ^^ If the "guides section" scm is the "international" one , which it is (afaik, otherwise it is different to both JP and international), then the relevant parts are identical. SCM is short for "main.scm", which is the file responsible for the missions.
Some guide (outside this thread) on how many different SCMs there are would be really nice, just some links to the SCMs and maybe a small description would do. Also, the international SCM would be nice if I could have a link (vice city -> data -> main.scm), I had to build my international SCM from the decompiled one in the guides section and I am not absolutely certain if it adds/simplifies things or something like that.
RC Raider Pickup is 4min long in the IL WR (3:55), your video shows 3:30 from starting StB to re-starting it. Then make less mistakes and route it properly. I'm quite interested to see the time save in the end, all things considered. :)
E: Btw, Pitpo, I looked into a Gun Runner instapass and there is little hope, unfortunately. For Distribution (and Pizza Boy on JP), I think I tried all options I seemed to have.
In 100% run you'll probably want to stay at the airport and do the stunts since you already have the PCJ with you. And if you add time saved from rerouting airport section, this instapass easily saves more time than 1,5 mins ;) (especially in my route)
Here are all 2 SCMs I have, Japanese one is from zoton's converter, international from my Polish retail (which is exactly the same as other international releases) https://drive.google.com/file/d/0B8EKoTr4vQlpOUF0LUNJbEVsS1U/view?usp=sharing