You may add as many IDX's as you would like. To do this, login to your admin, then do the following:
Click on the icon IDX Setup.
Click the link to Add IDX/MLS.
If you have different links for the search, agent listings or office listings then you can enter them here as well. Most MLS/IDX's only provide one link for the Search Link. This is usually a link to a search form.
Enter a IDX Display Name. Use a name that best describes the area(s) the MLS covers. This is what the visitor will see when selecting an IDX to search.
Select a display method you would like to use on your website. If you are not sure, select Use Inline Frame (Default).
Once finished, click Save Changes.
Your website will now allow visitors to select an IDX/MLS to search when they click to Search Properties.