Not through desktop manager. You say that you don't have email set up. Is that because you don't have a BB data plan, or you just haven't set it up? If the latter take the time, it will be quicker than the altrenative. Otherwise check the Ringtones, Themes, and Wallpapers
forum for a thread about ringtones/wallpapers without a data plan. Can't remember which its for, but the principle is the same.
Hope this helps.