---Installation---
Copy the "wersady" folder to "Steam/steamapps/common/Team Fortress 2/tf/materials"

In steam, right click TF2 and hit "Properties..." In the launch options, add "-tools -console"

Now, launch TF2 and the tools editor should be open. Select Tools -> Particle Editor, then File -> Open... and navigate to "unusual_custom_sunny_day.pcf"

Select "superrare_beams1_" from the list on the left. Go down to the bottom-center and locate the particle name. Remove the trailing underscore.

Hit F10 and then F11 to switch back to the main game. In the console type "map itemtest" and wait. Once the game has started up join a team and type "itemtest" into the console.

From the itemtest menu, select a class and a headwear. Under the unusual effects, select "Sunbeams" and then hit "Apply Test Items"

There should now be a bot with the hat you chose and the custom unusual effect.