To make a nametag, you will have to create a D3D or whatever it is called, and by making D3D, punkbuster will detect it.... as you want a guide / tutorial and unfortunately you seem to know nothing about coding, no one will bother to help you.
But if you know how to code, they will only provide you a code with the newest offsets (I think), though you can find these codes for free all over the internet, all you have to do is search, here are some tags for searching: BF3, Free, Hacks, Source, Codes,
Also there is a thread here in this section contains a bunch of codes, but I am pretty sure you know nothing about coding so basically you can forget about it!