First off, if your music has DRM, you will have to find a way to remove that first.
Plug phone into computer with usb cable. Select Mount or Disk Drive mode on the phone. The SD card should pop up on the computer, open it, and create a folder called Music. Then open your itunes, and drag and drop the music you want onto that folder. No need to use bloatware syncing programs, just drag and drop.
