How to install:

All:
Extract the .zip and open the folder marked adelaide_typewriter_smg.

Then either:

1, Copy the tf folder into your steam/steamapps/%yoursteamname%/team fortress 2/ folder,  your computer should then ask you if you want to merge the two "tf" folders together, ok it. You have now installed the weapon fully.

This may not work on some computers so if that includes you:

YOU MUST:
go into the defused_defiler_bottle/tf folder again and go into models/weapons/, you should see two folders called v_models and w_models, copy EVERYTHING from them into the equivilant folder in your steam/steamapps/%yoursteamname%/team fortress 2/tf/.

For example copy all the files marked v_bottle_demoman and the anims folder into steam/steamapps/%yoursteamname%/team fortress 2/tf/models/weapons/v_models 
and copy the files marked w_bottle into steam/steamapps/%yoursteamname%/team fortress 2/tf/models/weapons/w_models

Then go into adelaide typewriter_smg/tf/materials/models/weapons/c_items and copy both the "c_defused_defiler" into steam/steamapps/%yoursteamname%/team fortress 2/tf/materials/models/weapons/c_items.

3,
To get the and kill icons working repeat the process for their respective folders.