I tryto compare your changes against 1.4.3
In course/lib.php I see your /** marked changes, but also other ones with Spanish comments (I cannot read Spanish, but have the idea that it is about the different views for different type of students.
(Can you compare your changes against the official 1.4.3 release of 17 dec 2004?.... OOPS, I SEE I HAVE TO UPDATE TO DECEMBER 2004 )