First select if you want to replace the villians veil or the Professional's Panama.

Open the corresponding folder.

Put the two folders in the following directory:

c:/Program Files/Steam/steamapps/(username)/teamfortress 2/tf/

and in the box that pops up say you do want to merge the folders

if you like the item, vote it up on it's contribution page!:
http://steamcommunity.com/sharedfiles/filedetails/?id=2963

Made entirely by me, formic.sapien.

Email me at formic.sapien@gmail.com


TO DELETE:
if you want to get your Professional's Panama or Villian's Veil back just delete the custom
files named straw_hat (if villian's veil replacement) OR kerch (if villians veil replacement).

c:/Program Files/Steam/steamapps/(username)/teamfortress 2/tf/models/player/items/sniper

AND the items called chameleon in

c:/Program Files/Steam/steamapps/(username)/teamfortress 2/tf/materials/models/player/items/sniper


Special thanks:
Hellbender and his awesome tutorial.
My wife.
VALVe.