how do you change the type of music file you want to download?
 

whenever i search something it always comes up as a windows media file. how do i change this so that it comes up as an iTunes file?

You have to change the default player for that file type.

Open the folder with your files in it(in windows, not LW). Now right click a file and click on Properties > then click on "Change" > choose iTunes from the list > click OK > Apply > OK. Do that for each file type you want to change.

See: Setting Default video app