Location search with radius

Hi, I purchased Directory Press yesterday and I love the features but I wasn’t aware that you couldn’t search based on location with a radius (returning the nearest listing based on your location and the nearest alternatives if no exact match). This is something I really need, is there any way to implement it with a third party plugin or custom coding?

Also, I’ve set up a free membership package for visitors to allow them to log in and view favourites / messages. I’ve set the max number of submissions for this package to 0. Is there a way to remove the links to submit submission etc in their admin panel? Or is there a better way to set this up?