Hello,
That's good. Now once you are done in the App Builder, you should not have any icons with a pink border. That means,the program is incomplete. There are some options that must be enabled and cannot be hidden. (i.e. 'No Response' for Voice Menus). Also, you will not be able to see the App Id in the Services Directory.
Once you have made sure there are no errors, simply add the number (i.e. '0' for calls being bounced from operator) in the Services Directory and just point it to the AppBuilder Id you just created.
Hope this helps.
JurgenV