2) Now close iTunes and run PhoneAble, run through the steps.
3) Open iTunes again, click on the phone in the devices section, then on the summary tab there is an option "Manually manage music and videos", make sure that is on and Apply the change. Now try and drop some music files on the iPhone device, it should now allow you to copy music to your own phone.
iTunes 10Note: PhoneAble is not currently compatible with iTunes v10. The problem is that after PhoneAble sets the library key in iTunes config files, iTunes replaces the keys with the key it generated from somewhere else. I'm currently looking into the issue. So far I can't find where else it's storing the Library Key. (16/9/2010)
Note: The mac port is still in the process of being tested, there is a alpha release if you are dying to try it but it may not work as expected. And don't blame me if it destroys your iTunes config.