Changing display for my freind and I have never done a 4s before.

hello everyone!!!!

I have done screen repairs on my iphone4, it was easy with the help of guides and and you guys here on Ifixit, but now I am up against a greater challenge and I am a little nervous. The phone is an iPhone 4s and I have never done one before. I have heard that they are very similar and the guide on here looks pretty close but I cant find any good things that would help me out. Please guys help me out and tips, tricks things like that would be great and very helpful.

Thanks