This is your resource to discuss support topics with your peers, and learn from each other.
Are there any guidelines for settings screens? I couldn't find anything in the documentation. Maybe RIM could give some guidelines?
There is this UI Guidelines page, http://docs.blackberry.com/en/developers/deliverables/41577/
for settings, http://docs.blackberry.com/en/developers/deliverables/41577/settings.jsp
If this does not meet your needs perhaps checking out the cascades cookbook sample app be helpful.