How can one add a sound to an object in FS02?

Scenario:

Some areas contain broadcast radio/tv towers at various points in a given city. What I would like to do is add a sound to a radio tower and assign it a frequency selectable thru either the COM2 radio or ADF radio, as well as give this signal a coverage radius. The sound would loop like the ATIS audio.

Is this possible and if so, what editor/program would do the job?

Thanks for any tips!