Вот подробная инструкция с архива:
1.) Burn and install AutoCAD 2012 with 111-11111111,
222-22222222 or 333-33333333 as Serial and 225D1 as Product Key.
2.) Copy one of keygens (32bits or 64bits) from Crack folder to HDD.
3.) Click "Activation" on the activation screen, them select "I have
an activation code from Autodesk" and click Next.
If you see an error "Invalid serial number", then click "Close"
and confirm with "OK". Once again you find yourself in the
activation window, where you will repeat the first paragraph of
the third element.
4.) Run this keygen and press "Mem Patch".
(you should see "Successfully patched")
5.) Copy the Request Code from from the activation screen into the
keygen and press "Generate".
6.) Now copy the Activation Code back to the activation screen and
click Next. You have a fully registered autodesk product.
7.) Enjoy!
Похоже все там работает, что может быть не понятно!
и 
;
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