This is a segmented speed run that was put together in 121 parts. This is no longer the world's fastest run of Paradise lost based on the in-game timer.
Important things to note is that this was played on the hardest difficulty possible as well as with maximum bystander population. You can adjust the bystander population in this version of the game (Postal 2-Steam-US 5000-Hotfix 1) by accessing the achievements through the menu and then opening the options screen once more.
At the end of the run, you will notice that I am invincible, this was done through glitching, not cheating. I discovered that if you commit suicide (frame-perfect) just as the final boss battle concludes you will begin the final segment of the game completely impervious to damage.
This speed run took around a week to complete. I like to think of my first Postal 2 speed run as a warm-up to this run.
If I receive an adequate amount of interest from the comment section regarding the Apocalypse Weekend expansion levels, I will also speed run that.