Assassin´s Creed II Discussion
Trainers that have been personalized for Unlimited members require authentication before they will operate. Typically this is done over the Internet and is transparent to the user. If no Internet connection is present, an offline key is necessary. Download this file to create an authentication code for your computer then continue to the offline key creation page. You do not need to create a different key for each trainer.
----> Download Offline Key Request Tool <----- is one
----> Create My Offline Key <---- is two
As for where you put the offline key I assume in the same folder as the trainer you're trying to run, but it should have instructions with it?
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem