How do I Create Free Callback Ringtones?

Mac
1. Open iTunes and select 'Add to Library.' Locate the song you wish to add and press 'Add.'
2. Open 'Preferences' and select 'Import Settings.' Choose an encoder for your cell phone, either MP3 or WAV and click 'OK.'
3. Right-click on the desired song and scroll to the desired format option. The new song will appear in your iTunes library in the correct format.
4. Right-click on the new song and scroll to 'Get Info.' Change the stop and start time of the song to highlight the area you wish to use as your ringtone. For example, if you input '30' as your start time and '60' as your stop time, your callback tone will feature the second 30 seconds of the song.
5. Insert the USB cable into your phone. Insert the other side into the USB slot of your computer. Open the 'Finder' window and drag and drop the file that contains your new song into the phone icon.
PC
6. Download and install the Windows Media Player 'Trimmer' plug-in, if you wish to edit the start and stop time of your song.
7. Open the file of the song you wish to use. Drag your cursor over the area of the song you wish to use to highlight it. Press 'Trim.'
8. Press 'file' and click 'Save As.' Type a relevant file name.
9. Click the 'Burn' tab and select your new file. Open the CD door of your computer and insert a blank audio CD. Press 'Start Burn.' Allow the player to finish burning the CD. Select 'Options' from the 'Tools' menu and select 'Rip Music.' Select the appropriate format and click 'OK.'
10. Attach your phone to the computer using a USB cable. Copy and paste the song file into your phone.