: You must have Forge for 1.7.2 installed to load these mods. Quick Setup Guide Install Forge : Run the Forge installer for 1.7.2.

If you are using an axe from another mod, you might need to add that axe's ID to the TreeCapitator configuration file to make it work.

: Select the Forge profile in your Minecraft Launcher and hit play!

To get this working, you typically need two files: the mod itself and a "core" library that it depends on.