Default [Q] Been reading for 2 days!

Ok...I am ready for the abuse. I just don't want to screw this up. I have downloaded numerous files in anticipation of this all making sense. I know it is something so simple to do but I am just not getting it. Here is the deal. I am on Jellybomb which we all know is MJ4. I want to move to KitKat. I am thinking Freeza's Deodexed Stockisk rom. I know once I am there it should be fairly straight forward to flash Josh's KitKatKiller when it becomes available.

I am just hoping somebody can provide clear instructions on exactly how to do this. Thank you for any assistance provided.