How do I load music on my phone without using Windows Media Player?

From the Motorola Website:
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You can copy music files from the computer to an optional microSD memory card.
On your phone:

1. Press the Center Key.
2. Scroll to and Select Settings.
3. Scroll to and Select Connections.
4. Scroll to and Select USB Setting.
5. Scroll to and Select Memory Card.
6. Connect the USB cable to the mini-USB port on your phone and to an available USB port on your computer.

On your computer:

Note: Your memory card appear as Removable Disks on your computer. The below feature will not be available without a memory card.

• Locate the phone and memory card Removable Disk icons. On a Windows PC, the icons appear in the My Computer window. On a Mac, the icons appear on the desktop.
• Double-click the Removable Disk icon for your phone or memory card.
• Drag and drop the desired music files onto the appropriate Removable Disk icon.
• Remove the phone safely from your computer:
  On a Windows PC, right-click the Safely Remove Hardware icon in the system tray and select USB Mass Storage Device.
  On a Mac, drag the Removable Disk icon to the Trash.