I have a simple question and i'm not pretty sure what to do specifically here:

I've seen this from the tutorials but i'm not sure how to do it step by step?

I already had the YAF downloaded and seen the code through the solution included and had the database created as well but stopped there.

What should i do? next?

I don't understand this:

prerequisites

Install yaf as per the instructions into a subdirectory of your main website. I use ~/yaf.
Make sure that the standard installation works before you do the following, so you're only dealing with one thing at once.

How can i install YAF to my website? hope someone is kind enough to help me out..

Thanks and More Power...