If you cannot set ring tones through your mp3 songs options, you can have someone send you a song of 250kb or less through a text and you will be able to use that as a ring tone for your phone or contact.
try to burn to another place than itunes and thenplug your phone into the computer. (i'm not sure if it will work)
Amy has the Motorola Krave ZN4 from Verizon Wireless. =) it looks like a pretty sweet phone and im planning on getting it.
Zn4(SiO4)2