To put these in your rp do the following:
(Replace full theme address with the FULL URL of the music, WITHOUT ANY SPACES! Right click the link and click "Copy Shortcut" for the URL)

If you want them to play in the background:
<bgsound src="full theme address here" loop="infinite">

If you want the theme to display Window's media player/Realplayer on the page:
<embed src="full theme address here" loop="infinite">