First, we must bone up guides available online, including iFixit.
I also recommend taking photos during each step and prepare a dish, or a coffee cup to remove the screws.
Finally, it is imperative hair dryer (and three arms) to loosen the home button and speaker, as these are not provided with replacement front. Obviously if the screws lying on the table, this is the best way to lose them (hence the cup or mug for storage). Firmly press the home button then in the new frontage, otherwise we might feel a slight depression.
Do not forget to remove the grille from the speaker on the old front. It comes with some difficulty. I glued the sheets to superglue filing separately super glue and spreading using a small flat screwdriver supplied with this kit. I strongly advise against trying to put superglue directly, because you put too much and end up stuck with the fingers and / or torn tablecloth.