No, Media Manager shouldn't be needed in order to manage the contents of the device. On the device, activate MTP function and as soon as you plug it to the PC, the generic mass storage driver will be installed making the contents available through My Computer. Additionally, when the Coby device is attached to PC and MTP is enabled in the settings menu, a window should appear asking you to install the Media Manager. That's right, the Media Manager is stored on the internal partition of the device making it easier to install in case you've lost the CD or something happened with your PC.
