Having the USB cable is not enough... the easiest way to transfer music is using Motorola Phone Tools. It's the best option, the other one is using P2K progrmas, that are a littel bit more complicated
I agree with you, V3 is a lovely phone, but I have a K1 and it's giving a big fight to my old V3, it's far more easy to handle, and a lot more easy to personalize. That's only an opinion, I find K1 easiest to use.