How do you install a conversion mod on Steam?

[DnALANGE]

depends if it's an Isolated fc here is your awnser ;
for example c:\games\Amnesia DROP ALL FILES HERE.
So for an standard isolated fc it's something like this :
1 folder with all importend subfolders.
1 .bat files, for starting up the game. { the batch file has to refer to the amnesia .exe }
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Is this what you were looking for Neelke?

"" Isolated full conversion will NEVER change Original Amnesia files because it's using all it config files etc. within it's MAIN folder""