Click on
Search which is near the top of the screen and type in a word or words to find relevent threads and posts.
Read the X-Port info thread to see what an X-Port is and what it can do.
Find out how to edit the kits in the Kits and Badges section - which everyone can do in the Edit Mode of their game.
Patching is explained in the Editing section - where you burn an image of your original game but with patches applied to it so that things get modified in the game - such as adding the real kits with sponsors (which can't be done in normal edit mode).