DigitalDog is correct - but you must awkwardly select the custom profile twice!
Where is says profile > Managed by printer. Click on the drop down list and select other. Select the profile from your custom profile list (you can save time by checking all the custom profiles you plan on using) , then click OK.
It still says managed by printer. Now click 'other' and you will see all your profiles -and selecting one of then now works.
So selecting it twice is necessary only the first time.