Payday 2 CPU Affinity Issue

[WelshDdraig]

Hi everyone, I got a question I was wondering you might be able to help me solve.

So, I (like many others) still play Payday 2 and lets just say the Diesel Game Engine has not aged well - it was never great to begin with but that's another rant for a different story.  
While I have the system to obtain high FPS (a 144 fps at nearly all maxed settings) I notice a lot of game hitching in certain heists. I know how to fix this by doing the following:

1. Launch the Game
2. Alt + Tab and bring up the Task Manager
3. Find the Payday 2 Process
4. Manually set the CPU Affinity to use cores 0-5 on my Ryzen 5 3600. 

Once those steps are done - the issue disappears. Here's my question:

Is there a way to do this automatically with the launch of the game through Steam, or for it to be automatically done on the game's launch? 

 

I did find this SuperUser thread (https://superuser.com/questions/908848/how-do-i-permanently-set-the-affinity-of-a-process) that describes something similar, however Payday is weird and occasionally will not launch via a shortcut that has been modified (it sometimes insists that it is launched through Steam :/)

 

It's not that much of a hassle to do, but having it done automatically would be nice.

 

Cheers for reading and I look forward to possible help with this issue.