You have great flexibility in naming your songs, depending on your radio's character display capacity. To change the name of tracks, right click on any playlist and select "Change Display Name of Songs To". This selection will only affect the playlist you select - this lets you name tracks on different playlists in different ways if you want!
You can select from the default listing of tracks, or you can create your own. To do so, select "Add a New Pattern" at the bottom of the drop down list. This will take you to the Tag to Filename Patterns screen.
On this screen you will notice an array of buttons (Artist, Album, Title, Track, Comments, Genre, and Year) listed below a text entry field. You can select any of those buttons in whatever order you choose to create the display of information on your radio! Some of the combinations you can create are illustrated above. Note that as far as the usage of special characters goes, you can only use those that are on your keyboard. (Please note that you cannot use higher ASCII characters.)
Another thing to consider is how sorting is affected by your naming choice. A sort on the files with a pattern you've chosen may not display the files the way you want. You can however temporarily name the files in the way you want them sorted, sort them, then rename them in the way that you want.
For example, you want your tracks on this disc to be sorted by album, then track, then title, then artist, but you only want to display title and artist. All you have to do is name the tracks initially with the fifth pattern shown above, sort the tracks, then rename them with the sixth pattern above. This will preserve your sort order while showing the track name in the way you want!