I added the mod to my mods folder and the game crashed. So took out every other mod too see if that was a problem but nope. Even with just this mod it crashed. Latest forge 1.8 being used.

The game crashed whilst rendering screen
Error: java.lang.NoSuchMethodError: net.minecraftforge.client.event.GuiScreenEvent$DrawScreenEvent.getGui()Lnet/minecraft/client/gui/GuiScreen;

^^^^ Popped up as the error. Any help would be great :D