I'm not sure I understand, but I will elaborate just incase.
On all the lists and libraries there is an option for "Metadata Navigation" under the settings. It is great for organizing your information, but in order to use it the column needs to be a drop down. This works using InfoPath and a list with a few minor work arounds.
When using InfoPath to create your library and adding your column name at publishing time the column is added as a "single line of text." Single line of text doesn't work with the "Metadata Navigation."
So I thought if I created the library first with a drop down column already added, I could work around this. It does work except that when you update the drop down from the form it does not update it library column list of choices.
The idea is to have a form with a location drop down so that I can filter the library items using the "Metadata Navigation." I know I could just sort by column in a view, but this option just works so well for sorting and filtering.