Change Vw Key Blade Replacing A VW Fob Key Blade.?

Replacing a VW fob key blade.? - change vw key blade

My friend found a set of keys for VW and they gave me because I was an old golf, and I put my key in the street, like new, how to change the blade? I do it because I set foot on the key remote. (I want luxury:) see P to