Nokia 2125i / 2126i / 2128i

If I buy the usb cord that goes with the phone, can I import ringtones? Like real music ringtones? because the only thing I found that I could get off the net was stuff that wasn't compatible with the phone, and the stuff I did find that was compatible via vtext dot com didn't sound good. (aka: MIDI sounding file) Call me picky or whatever, but this is my only problem with the phone, it has good reception, its a good size, now I just want it to sound good.

Also, if I could do that, how would I go about doing that, would I just transfer an mp3 file to the phone, or would I have to convert to a certain file type first?

Thanks in advance.