Connect your Droid to your computer using your USB cable.
Swipe your top notification bar downward and click on the SD Card Mount permission
Your SD card will show up on your desktop
Drag & drop your music from iTunes library to the music folder on your SD card
Unmount your SD card from your Droid
When listening to the song, hold down the menu key. An option will pop up saying "Add to ringtones." Select.
Then go into ringtones and select the song you just added to the list.
If you want a specific segment of the song, then you'll want to make a shortened version. I use Audacity to shorten my songs (if I want them shortened).
If you don't mind it starting right from the beginning of the song, then you don't have to shorten it.
Yes, you can use your Droid like an iPod as it has a 16 GB card.
Hope this helps!
