Prepopulate dropdown with name of posts

Hi

I have tried to complete this customization myself after reading the tutorial.

Dynamically Populating Drop Down Fields
http://www.gravityhelp.com/documentation/page/Dynamically_Populating_Drop_Down_Fields

And I gave it a go… and haven't seen any errors pop up… But haven't found where the post titles are suppose to show up in the gravity form admin area.

Here is the code that I slightly altered for pastebin:
http://pastebin.com/hJkRtLCc

So now I am unsure whether this is the function I need. Here is what I am looking for :

We're using WordPress as a store directory for a local mall and we will give the tenants a hidden page where they can send changes to their contact. We have a category of posts called store directory and I though we could pre-populate a drop down menu with the names of the store from the category of post.

For example:

Hardware Store
Grocery Store
Restaurant

If they all had a published post then it would show up in the form. If the business left the mall the listing would get deleted and the option would get automatically removed from the form.

I have a feeling Gravity Forms can do this I just not sure I have the right code (see above) to do it.

Any help or assistance would be great!

See if this post is of any help:

http://www.gravityhelp.com/forums/topic/dynamically-populating-a-field-with-category-names

Ok… I have made some more progress in my quest… I am actually looking to:
Allow field to be populated dynamically buy query string. And that query being all the posts in the store directory category.

As long as that is what I need to do to… Then I can hire someone to do that. As it seems a little over my coding ability. I just didn't want to send him down a wild goose chase without providing some resources as to how to do it.