I am not familiar with the usage of the 3D shader, but there's a topic for it in here:
reshade.me/forum/shader-presentation/212...-stereoscopic-shader
I think you should download ReShade only from this source at the home page.
Run the installer and select the game.exe (not the launcher, if it has one) then choose the right API for the said game (D3D9, DX10/11, opengl).
The default key to open the ReShade's overlay is Shift+F2.
The step 3 on your potst shows that the person who uploaded it has already assigned the keys F6 and F7 to some shaders, you can do it yourself too.
The purpose of the ReShade 32/64 is for when you have to pick one of the DLLs and put into the game's folder accordingly to it's need. If the game has a 64 bit executable, you should use the ReShade 64 bit and rename it accordingly, the same thing if it is a 32 bit game.
I did not understand that part "How do you link the dll's and what do you link them to?"