I saw the sticky, this way don't work have been patched since few month.
I did one for you =D
To edit scope you need Paint.net search on google to download.
To play with your custom Scope :
1. Go In Warrock Folder>Texture>UI>Arms>Crosshair
2. Name your custom scope : scope
And EnJoy
Screenshot :
Virus Scan :Virustotal. MD5: a5d5357568eb51b8b27e0c5dd0846691