How to use an iPhone 4s key to enable siri on my iPhone 4?

I can't find any updated guides on how to do this. I don't want to go a free route, since I have access to an iPhone 4s. The iPhone 4s is not jailbroken, but the iPhone 4 is. I've read through the process for getting the key, and I think I can do it. Also, I have a mac. My question is, how do I actually go about setting everything up? I have Acid Siri installed currently, is it an acceptable GUI?

Jailbreak your 4S then go to Cydia then Install Acid Siri
WARNING: I Recommend Sprite and Google an key. It is Way easily

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