Since you have a 1024 you will not be able to sync up a show to a mp3 audio file using easy show. what you could do is program a scene for each change of lighting in the song you want then create a cycle that includes all those scenes. when you edit the cycle you can have each scene playback as a "GO" cue. Which means it stays on that scene till you hit the up or down arrow keys to move through your cue list. I believe i have a video on this.
www.youtube.com/compulivetech
Let me know how it goes.
Sincerely,