Hi this is not my module, but I got it to work by using a textinput box and using a single letter. So if as in my other post, create a custom entry as a textbox, restrict the entry to just 1 character. Then in the entry listing itself put 'y' or whatever you want to signify this entry to display in the module.
In the module paramaters put in the field #, and the matching "y" ....
I originally used the state listing as all my listings were in GA. So i just defined the 'value' as "GA" and they all appeared.
Hope that helps...cheers