How do I search for BB..CC...DD?

1. Open on-line class schedule for the term you want to register for, example :Spring 2012, Summer 1012.
2. Unclick "show only open classes". This will list open and closed classes (in case you want to crash a class).
3. Click green box "Additional Search Criteria".
4. Scroll down and look for two magnifying classes.
5. Click on first one, Course Attribute, then select "General Education Requirements".
6. Click on the second one, Course Attribute Value, then Select "BB", "CC" or "DD" from list.

 Give me the full tutorial