Add some static text to top main body in Chamilo LMS course section.

I Use Chamilo LMS. I would like to add some static text and a Google AD on top of the Course page. This page appears from "[login to view URL]" and "[login to view URL]" file but it may involve other files. I don't know Im not a programmer. I attached those 2 files + the code it needs to be added to the top of the course page. I think the job is pretty straight forward.