Main Portfolio page

How can I control the main portfolio page?

I have an area called success stories that I want to use the portfolio template page for, BUT, I want to be able to contol which portfolio categories appear on the main page and which categories are available from the drop down

here is the page:

http://bacd.ca/test-portfolio/

here is the page I want to convert to the portfolio template page:

http://bacd.ca/success-stories/

here is the site I would like to emulate:

http://smallbusinessbc.ca/success-stories/

help please!

Megan