Tutorial of how to create custom ringtones using songs from iTunes on Mac osx. This should work the same fror osx leopard users and not too sure about pc users, but should also be similar as well.
Remember to make an aac version of the aac version you just edited and convert to .m4r format in finder, delete the aac version from iTunes but keep the file and drag it to iTunes when converted to .m4r. The file can now be found in tones/ringtones and be synced to your iPhone, enjoy
