You can "render it to Audio CD" with the WAV button in the menu or under the audio pull down menu. RW is rewritable so if you want to re-use the CD over and over again, you could use that option. If it has to be a permanent CD, then just use the normal writables (R) CD's. If you still want to be able to add a track later you can use the option "Burn CD-No finalize" (then when you are finished you can also "only finalize" it in that screen), otherwise select "Burn+finalize".

I'll be back...