It will tell you if you missing something.Place the Downloaded Installer and the downloaded files next to each other and run the installer.the Installer will tell you if you have the right forge installed or not.Install the given Minecraft Forge build before using the installer!.Then press Install button in the installers.The Installers should find your minecraft folder, if not browse and select it.Run each downloaded installer file you have downloaded in step 1.Download the installers if they are available next to the mods you want to use!.Then put the downloaded mod jar files in to your 'mods' folder.If you already have used forge you must find there a 'mods', if not then create it.After forge Install find and open your '.minecraft' folder.Install the given Minecraft Forge build by double clicking on it and following the on screen instuctions.Older mods might have an Installer at the bottom of the build list, to use that follow the old Installers instructions. If there is an installer link next to the mod, then use that link to download the installer and follow the new Installers instructions. The link with the mods name is not an installer. One for each mod, either you download the mod jar or its installer.