I need help installing NBA Action 15

I have both 15 and 14 and have absolutely no clue on how to install the mods......I can't find anywhere any instructions so he'll would be nice

Here's a quick tutorial:
Extract and Paste all the files you've downloaded in a new folder (Probably titled NBA Live 14 or NBA Action 15)
Then paste the other files (folders) that are in your default Live 08 but not in the new folder

Hope this clears things up, and that was the way I installed 14.