Okay, get a pencil cause here we go. First, get a .meg extracter. This one is good.
Just drag the .meg file over the program and it will spit out the files. Got alittle ahead of my self.
+Okay, once you dopwnload it, put it in the Empire at War/GameData/Data folder.
+Drag the Music.meg file over the extracter.
+A DOS window will pop up and a new folder called Audio will appear in that directory.
+Go into the Audio folder and go into the Music folder. You can rename your file to overwrite the ones you want to.
You are most likely asking, "But what song goes to what?"
I'll tell you.
Now extract the Config.meg file. A XML folder will pop up. Go inside and find the Muisc or Audio XML file. Open it with Notepad. Inside will be a list of events and tracks that it uses. Hope that helps.
Just ask if anything is unclear.