One of the issues that I am dealing with on a client site is with the display of listing subscription options. By default Payments Plus will remove the "Add Your Listing" text link that is built into the category pages of Mosets Tree. This is the link that if clicked on will display a form through which a user can submit a new listing to the directory.
Instead of this Add Your Listing link, Payments Plus will display a list of all of your current Subscription Options.

My apologies. More to come...