US Cellular RAZR 3 usb support???

hey guys, i just bought a new RAZR v3c from us cellular, and i also got a usb cord for it thinking i could connect it to my computer so i could put my own ringtones on it and photo's. i am just wondering, my friend has cingular and he has a razr and when he goes to settings, then connection, he cant set his usb as a modem or data transfer. When i go to my settings and connection, it only says bluetooth, and something else. If anyone has US cellular and has a razr v3c, please tell me if its possible to use a software to put media on the phone. thanks