Well you can find the ringtone/song you want. And download Audacity, and with audacity you can trim it down to less than 30 seconds. Then if you have a usb cabel, you can download bitpim and send it to your phone through that. Or if you want, you can email it to yourself. For a verizon phone, just go
[email protected] and it will send it to your phone. Has to be under 350KB.