Installation instructions can be found in the read me file.
-IF VALVE UPDATES THE ANIMATIONS AND IT BREAKS THE MOD-
If valve updates their animations, and it breaks this mod, you can actually update this mod yourself.
Use GCFscape to open tf2_misc_dir.vpk (which is located in your tf folder), and then extract soldier_animations.mdl from \models\player\ then rename it to soldier_animations_valve.mdl and place in the bigger stick mod files. (ex:custom\bigger stick - stock\models\player).
It should then replace the model file there, and your mod is now updated.