(Not sure if this is the right place...... other Mods... move if neccesary.)
If you are interested in learning a bit more about the relationship between the commercial aviation ATC system in FS2004 and the one that happens in the real world......... try out the combination of the following two links at the same time:
First of all..... load up the following link into your streaming audio media player:
http://audio2.km3t.org:8010/bos_gnd_twr
You can also go here and get this and other airport's live ATC... such as KJFK: http://www.liveatc.net/
That above link will give you streaming live ATC from KBOS...... Logan International in Boston, MA USA.