It's very simple

you just go to

C:\Program Files\Steam\steamapps\<your-account's-ID>\team fortress 2\tf\materials\models\player

Note: if this folder doesn't exist, create it. it has to be exactly like it is written in the above filepath!

and when you are in the weapons folder

just copy the folder from the archive to the weapons folder

make sure you are in the correct filepath!

Made By DiviX (Me..)

if you have any ideas, critism and stuff like that send it to me at: AlonDiviX@gmail.com

Thanks for downloading my skin!