On windows open Run from the start menu, type %appdata%\.minecraft\ and click Run.
On mac open finder, hold down ALT and click Go then Library in the top menu bar. Open the folder Application Support and look for minecraft.
Extract WDlibs to Mods folder
Place the mod you have just downloaded (.jar or .zip file) into the Mods folder.
Do not unzip it. If you don’t have a mods folder, create one
Play and Enjoy!
If you don’t have 32 bit windows:
Start the Minecraft launcher. Check that the selected Profile is Forge and click on “Edit Profile”.
In the “Java Settings” category, check “Executable” and in the text field put the path to your javaw.exe from your 32 bits Java ! Click Save profile and enjoy.
To find your java 32bits path:
Usually it’s Program Files (x86) >> Java >> jre7 >> bin >> javaw.exe if this file can’t be found, then open Program Files (x86) if this directory doesn’t exist, then you have a 32bit windows, just start the game. Go to the Java directory. If it doesn’t exist or if there is no folders inside it, then please Install java 32 bits.
Now open the jreX folder or jdk1.X.Y_Z where X is at least 7 (can be higher but NOT lower. If it’s lower, install java 7 32 bits). Open the bin folder. You have found you java 32 bits path. Copy it and past it in the “Executable” field, don’t forget to add javaw.exe after it.