I'm not sure there is a way without using a paid program and this is exactly where Itunes completely fails. (fail is not even a strong enough word for it).
With a quick google search i found this thread giving a lot of links to paid programs that you could try the trial version of (or get a cracked copy): http://www.everythingicafe.com/forum...ter-10737.html
Apple's site shows a way to do it with the iPod, but i believe it does not work with the iPhone. You can give it a try anyways: http://support.apple.com/kb/ht1329