InstType and SectionIn

I need a little help getting the InstType and SectionIn specified. What I would like is for the "Typical" install type to display two required read-only sections and the "Custom" to display the same two sections with the optional checkboxes. I am having some trouble figuring out what combination will do that.

I used the documented:
InstType "Typical"
InstType /COMPONENTSONLYONCUSTOM
To solve this problem. Trying to use the read only sections was just not working out. The ()'s instead of {} for the descriptions gave me trouble for awhile too until I saw that documented for MUI as well. All is working well now.