If you’re anything like us then you have multiple computers. It gets pretty hard to keep everything on one computer. For example you like songs on your friend’s computer and would like to add it your iPhone. Apple hasn’t given us the ability to do that. There are a couple if different ways to do it like with Hex editor, but it gets time consuming.
The easiest way do it is with Phoneable software. It’s free and really simple to use. All you have to do is just follow the instructions on the screen.
You can’t use it with iTunes 10 yet but it will be updated soon. It’s only available for windows, but there is a Mac version available which is in beta so use it at your own expense.