about section and subsection

¡á-AC3
|
|-¡á 2.1 CH
|
|-¡à 5.1 CH
¡á-DTS
|
|-¡á 2.1 CH
|
|-¡à 5.1 CH
-----------------------------
like this section, user check AC3's 2.1CH section, then
automatically check DTS's 2.1CH.
or check AC3's 5.1CH, automatically check DTS's 5.1CH.

and 1 more question.
how can i hide section?

plz help me

use SectionSetFlags

info in: 4.9.13.1 SectionSetFlags
from help file