HOW TO USE ID 12 RFID TAG

I would like to learn how to use ID-12 for increment my project

first of all Learn how to read one tag with ID-12
second I would like to know how turn ON one Led when read One TAG with ID-12?
for hour just it...

later I set more doubt

thank's

The first step is to buy an ID-12 reader that comes with an Arduino library.

I bought it, but now I'm waiting for it arrive here.

then I would like to know how to use or...some arduino library...

I would like to know how to use

http://bildr.org/2011/02/rfid-arduino/