Get the mp3 you want, chop out the bit you like from the song with something like Audacity
, and just upload it to the phone.
If the file is in some proprietary sh*t format and you need to convert it, Oxelon
is probably the best audio/video converter I've ever seen. If all else fails with the DRM from Apple, find the song you want on youtube (nearly any OST you can think of should be on there) and download it with this
Everything I've linked is free. Edited, Jul 11th 2011 1:26pm by bsphil