PerformLAB

I hate asking for help as I am very much a noob and will need quite a bit of explanations I am assuming, but I would love to be able to get Darkness Falls mod. However, I know very little about how to go about it. I have read thru this threads initial posts, and scrolled thru some more, without finding a ''dummy's'' explanation. I did figure out I needed the MOD launcher, and got that done. I am assuming next step would be to find the Darkness Falls files, which I have yet to find. And the following step would be? (I would also need this to work for Multiplayer as we are usually playing with more than 1 in our games.) If anyone could guide me thru this, it would be greatly appreciated. Thanks!