Click on the spray that you want to download. It’ll be in a .zip file.

Unzip the file.

You’ll get a folder called logos. This folder will contain two files for each spray and another folder called UI with 1 more file for each spray.

Right click on the logos folder and choose copy.

Now you need to navigate to the proper folder on your HD. For most people this folder will be located at:

C:\Program Files\Steam\steamapps\USERNAME\team fortress 2\tf\materials\VGUI

(Of course, USERNAME will be YOUR Steam account name).

Paste the logos folder into the VGUI folder. Click ok when asked if you want to copy over the files/folders that already exist.

That’s it. Next time you load up TeamFortress 2 you can go to your Multiplayer options and choose your new spray from the drop down menu.