Domain Mapping, how do I do it for each of our Sub Directories?

So we're radio stations, and we're testing out this Wordpress Multisite. The problem is, each network site (radio station) the url looks horrible because it's a sub-directory. So we would want to domain map each one so that people type in "radiostationname".com and it takes you to where they need to go. Is this the right plugin to do that? How would I set that up? Thank you!