I just find that part of the code and copy/ paste them where I need them, it just takes making sure you know where to place it without breaking it ^^;  Same thing for adding more boxes, you find the code that's for one box, and then copy and paste that part as many times you need to.

Oh for those longer banner parts I took the box that said "folder name" and placed it above and between the boxes and edited it a bit to make it the longer length ^^ hope this makes sense ;v;